Home / 128,304.36-177,060.24-71,715.69

Finding the Fourth Proportional to 128,304.36, 177,060.24 and 71,715.69

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Solution

The fourth proportional to 128,304.36, 177,060.24 and 71,715.69 is: 98,967.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,304.36 : 177,060.24 = 71,715.69 : x
  2. Step 2: Convert to fraction form
    128,304.36/177,060.24 = 71,715.69/x
  3. Step 3: Cross multiply
    128,304.36x = 177,060.24 × 71,715.69
  4. Step 4: Simplify right side
    128,304.36x = 12,697,997,283.17
  5. Step 5: Solve for x
    x = 12,697,997,283.17/128,304.36
  6. Step 6: Final answer
    x = 98,967.78

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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.