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Finding the Fourth Proportional to 458,161.20, 687,241.80 and 125,737.20

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Solution

The fourth proportional to 458,161.20, 687,241.80 and 125,737.20 is: 188,605.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    458,161.20 : 687,241.80 = 125,737.20 : x
  2. Step 2: Convert to fraction form
    458,161.20/687,241.80 = 125,737.20/x
  3. Step 3: Cross multiply
    458,161.20x = 687,241.80 × 125,737.20
  4. Step 4: Simplify right side
    458,161.20x = 86,411,859,654.96
  5. Step 5: Solve for x
    x = 86,411,859,654.96/458,161.20
  6. Step 6: Final answer
    x = 188,605.80

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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.