Home / 129,234.96-178,332.30-74,778.66

Finding the Fourth Proportional to 129,234.96, 178,332.30 and 74,778.66

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Solution

The fourth proportional to 129,234.96, 178,332.30 and 74,778.66 is: 103,187.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,234.96 : 178,332.30 = 74,778.66 : x
  2. Step 2: Convert to fraction form
    129,234.96/178,332.30 = 74,778.66/x
  3. Step 3: Cross multiply
    129,234.96x = 178,332.30 × 74,778.66
  4. Step 4: Simplify right side
    129,234.96x = 13,335,450,428.72
  5. Step 5: Solve for x
    x = 13,335,450,428.72/129,234.96
  6. Step 6: Final answer
    x = 103,187.64

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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.