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Finding the Fourth Proportional to 84,666.52, 126,910.87 and 28,487.12

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Solution

The fourth proportional to 84,666.52, 126,910.87 and 28,487.12 is: 42,700.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,666.52 : 126,910.87 = 28,487.12 : x
  2. Step 2: Convert to fraction form
    84,666.52/126,910.87 = 28,487.12/x
  3. Step 3: Cross multiply
    84,666.52x = 126,910.87 × 28,487.12
  4. Step 4: Simplify right side
    84,666.52x = 3,615,325,191.10
  5. Step 5: Solve for x
    x = 3,615,325,191.10/84,666.52
  6. Step 6: Final answer
    x = 42,700.77

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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.