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Finding the Fourth Proportional to 87,247.88, 130,892.70 and 28,089.08

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Solution

The fourth proportional to 87,247.88, 130,892.70 and 28,089.08 is: 42,140.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,247.88 : 130,892.70 = 28,089.08 : x
  2. Step 2: Convert to fraction form
    87,247.88/130,892.70 = 28,089.08/x
  3. Step 3: Cross multiply
    87,247.88x = 130,892.70 × 28,089.08
  4. Step 4: Simplify right side
    87,247.88x = 3,676,655,521.72
  5. Step 5: Solve for x
    x = 3,676,655,521.72/87,247.88
  6. Step 6: Final answer
    x = 42,140.34

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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.