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Finding the Fourth Proportional to 125,241.80, 187,419.24 and 77,879.20

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Solution

The fourth proportional to 125,241.80, 187,419.24 and 77,879.20 is: 116,543.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,241.80 : 187,419.24 = 77,879.20 : x
  2. Step 2: Convert to fraction form
    125,241.80/187,419.24 = 77,879.20/x
  3. Step 3: Cross multiply
    125,241.80x = 187,419.24 × 77,879.20
  4. Step 4: Simplify right side
    125,241.80x = 14,596,060,475.81
  5. Step 5: Solve for x
    x = 14,596,060,475.81/125,241.80
  6. Step 6: Final answer
    x = 116,543.04

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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.