Home / 129,515.65-178,731.43-72,927.43

Finding the Fourth Proportional to 129,515.65, 178,731.43 and 72,927.43

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Solution

The fourth proportional to 129,515.65, 178,731.43 and 72,927.43 is: 100,639.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,515.65 : 178,731.43 = 72,927.43 : x
  2. Step 2: Convert to fraction form
    129,515.65/178,731.43 = 72,927.43/x
  3. Step 3: Cross multiply
    129,515.65x = 178,731.43 × 72,927.43
  4. Step 4: Simplify right side
    129,515.65x = 13,034,423,850.12
  5. Step 5: Solve for x
    x = 13,034,423,850.12/129,515.65
  6. Step 6: Final answer
    x = 100,639.76

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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.