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Finding the Fourth Proportional to 87,135.92, 130,784.04 and 53,920.88

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Solution

The fourth proportional to 87,135.92, 130,784.04 and 53,920.88 is: 80,930.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,135.92 : 130,784.04 = 53,920.88 : x
  2. Step 2: Convert to fraction form
    87,135.92/130,784.04 = 53,920.88/x
  3. Step 3: Cross multiply
    87,135.92x = 130,784.04 × 53,920.88
  4. Step 4: Simplify right side
    87,135.92x = 7,051,990,526.76
  5. Step 5: Solve for x
    x = 7,051,990,526.76/87,135.92
  6. Step 6: Final answer
    x = 80,930.92

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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.