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Finding the Fourth Proportional to 87,654.68, 131,398.77 and 28,448.94

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Solution

The fourth proportional to 87,654.68, 131,398.77 and 28,448.94 is: 42,646.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,654.68 : 131,398.77 = 28,448.94 : x
  2. Step 2: Convert to fraction form
    87,654.68/131,398.77 = 28,448.94/x
  3. Step 3: Cross multiply
    87,654.68x = 131,398.77 × 28,448.94
  4. Step 4: Simplify right side
    87,654.68x = 3,738,155,723.80
  5. Step 5: Solve for x
    x = 3,738,155,723.80/87,654.68
  6. Step 6: Final answer
    x = 42,646.39

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1.5x scale

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.