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Finding the Fourth Proportional to 125,129.60, 187,693.80 and 42,023.60

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Solution

The fourth proportional to 125,129.60, 187,693.80 and 42,023.60 is: 63,035.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,129.60 : 187,693.80 = 42,023.60 : x
  2. Step 2: Convert to fraction form
    125,129.60/187,693.80 = 42,023.60/x
  3. Step 3: Cross multiply
    125,129.60x = 187,693.80 × 42,023.60
  4. Step 4: Simplify right side
    125,129.60x = 7,887,569,173.68
  5. Step 5: Solve for x
    x = 7,887,569,173.68/125,129.60
  6. Step 6: Final answer
    x = 63,035.20

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.