Home / 129,526.92-178,772.28-72,938.64

Finding the Fourth Proportional to 129,526.92, 178,772.28 and 72,938.64

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Solution

The fourth proportional to 129,526.92, 178,772.28 and 72,938.64 is: 100,669.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,526.92 : 178,772.28 = 72,938.64 : x
  2. Step 2: Convert to fraction form
    129,526.92/178,772.28 = 72,938.64/x
  3. Step 3: Cross multiply
    129,526.92x = 178,772.28 × 72,938.64
  4. Step 4: Simplify right side
    129,526.92x = 13,039,406,972.90
  5. Step 5: Solve for x
    x = 13,039,406,972.90/129,526.92
  6. Step 6: Final answer
    x = 100,669.47

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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.