Home / 211,078,472,972.88-291,320,133,497.40-128,727,008,861.36

Finding the Fourth Proportional to 211,078,472,972.88, 291,320,133,497.40 and 128,727,008,861.36

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Solution

The fourth proportional to 211,078,472,972.88, 291,320,133,497.40 and 128,727,008,861.36 is: 177,662,690,458.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,078,472,972.88 : 291,320,133,497.40 = 128,727,008,861.36 : x
  2. Step 2: Convert to fraction form
    211,078,472,972.88/291,320,133,497.40 = 128,727,008,861.36/x
  3. Step 3: Cross multiply
    211,078,472,972.88x = 291,320,133,497.40 × 128,727,008,861.36
  4. Step 4: Simplify right side
    211,078,472,972.88x = 37,500,769,406,212,391,305,216
  5. Step 5: Solve for x
    x = 37,500,769,406,212,391,305,216/211,078,472,972.88
  6. Step 6: Final answer
    x = 177,662,690,458.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.