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Finding the Fourth Proportional to 87,248.64, 130,845.21 and 28,070.54

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Solution

The fourth proportional to 87,248.64, 130,845.21 and 28,070.54 is: 42,096.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,248.64 : 130,845.21 = 28,070.54 : x
  2. Step 2: Convert to fraction form
    87,248.64/130,845.21 = 28,070.54/x
  3. Step 3: Cross multiply
    87,248.64x = 130,845.21 × 28,070.54
  4. Step 4: Simplify right side
    87,248.64x = 3,672,895,046.89
  5. Step 5: Solve for x
    x = 3,672,895,046.89/87,248.64
  6. Step 6: Final answer
    x = 42,096.87

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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.