Home / 128,299.72-177,046.47-70,935.72

Finding the Fourth Proportional to 128,299.72, 177,046.47 and 70,935.72

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Solution

The fourth proportional to 128,299.72, 177,046.47 and 70,935.72 is: 97,887.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,299.72 : 177,046.47 = 70,935.72 : x
  2. Step 2: Convert to fraction form
    128,299.72/177,046.47 = 70,935.72/x
  3. Step 3: Cross multiply
    128,299.72x = 177,046.47 × 70,935.72
  4. Step 4: Simplify right side
    128,299.72x = 12,558,918,822.91
  5. Step 5: Solve for x
    x = 12,558,918,822.91/128,299.72
  6. Step 6: Final answer
    x = 97,887.34

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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.