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Finding the Fourth Proportional to 125,020.86, 172,529.87 and 71,308.59

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Solution

The fourth proportional to 125,020.86, 172,529.87 and 71,308.59 is: 98,406.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,020.86 : 172,529.87 = 71,308.59 : x
  2. Step 2: Convert to fraction form
    125,020.86/172,529.87 = 71,308.59/x
  3. Step 3: Cross multiply
    125,020.86x = 172,529.87 × 71,308.59
  4. Step 4: Simplify right side
    125,020.86x = 12,302,861,406.04
  5. Step 5: Solve for x
    x = 12,302,861,406.04/125,020.86
  6. Step 6: Final answer
    x = 98,406.47

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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.