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Finding the Fourth Proportional to 84,545.59, 126,820.43 and 28,387.53

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Solution

The fourth proportional to 84,545.59, 126,820.43 and 28,387.53 is: 42,581.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,545.59 : 126,820.43 = 28,387.53 : x
  2. Step 2: Convert to fraction form
    84,545.59/126,820.43 = 28,387.53/x
  3. Step 3: Cross multiply
    84,545.59x = 126,820.43 × 28,387.53
  4. Step 4: Simplify right side
    84,545.59x = 3,600,118,885.43
  5. Step 5: Solve for x
    x = 3,600,118,885.43/84,545.59
  6. Step 6: Final answer
    x = 42,581.98

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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.