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Finding the Fourth Proportional to 125,259.48, 187,908.66 and 42,147

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Solution

The fourth proportional to 125,259.48, 187,908.66 and 42,147 is: 63,227.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,259.48 : 187,908.66 = 42,147 : x
  2. Step 2: Convert to fraction form
    125,259.48/187,908.66 = 42,147/x
  3. Step 3: Cross multiply
    125,259.48x = 187,908.66 × 42,147
  4. Step 4: Simplify right side
    125,259.48x = 7,919,786,293.02
  5. Step 5: Solve for x
    x = 7,919,786,293.02/125,259.48
  6. Step 6: Final answer
    x = 63,227.04

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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.