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Finding the Fourth Proportional to 87,000.72, 130,469.12 and 30,060.16

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Solution

The fourth proportional to 87,000.72, 130,469.12 and 30,060.16 is: 45,079.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,000.72 : 130,469.12 = 30,060.16 : x
  2. Step 2: Convert to fraction form
    87,000.72/130,469.12 = 30,060.16/x
  3. Step 3: Cross multiply
    87,000.72x = 130,469.12 × 30,060.16
  4. Step 4: Simplify right side
    87,000.72x = 3,921,922,622.26
  5. Step 5: Solve for x
    x = 3,921,922,622.26/87,000.72
  6. Step 6: Final answer
    x = 45,079.20

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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.