Home / 129,585.42-178,829.67-72,223.15

Finding the Fourth Proportional to 129,585.42, 178,829.67 and 72,223.15

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Solution

The fourth proportional to 129,585.42, 178,829.67 and 72,223.15 is: 99,668.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,585.42 : 178,829.67 = 72,223.15 : x
  2. Step 2: Convert to fraction form
    129,585.42/178,829.67 = 72,223.15/x
  3. Step 3: Cross multiply
    129,585.42x = 178,829.67 × 72,223.15
  4. Step 4: Simplify right side
    129,585.42x = 12,915,641,736.97
  5. Step 5: Solve for x
    x = 12,915,641,736.97/129,585.42
  6. Step 6: Final answer
    x = 99,668.94

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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.