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Finding the Fourth Proportional to 87,163.80, 130,680.90 and 47,765.40

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Solution

The fourth proportional to 87,163.80, 130,680.90 and 47,765.40 is: 71,612.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,163.80 : 130,680.90 = 47,765.40 : x
  2. Step 2: Convert to fraction form
    87,163.80/130,680.90 = 47,765.40/x
  3. Step 3: Cross multiply
    87,163.80x = 130,680.90 × 47,765.40
  4. Step 4: Simplify right side
    87,163.80x = 6,242,025,460.86
  5. Step 5: Solve for x
    x = 6,242,025,460.86/87,163.80
  6. Step 6: Final answer
    x = 71,612.59

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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.