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Finding the Fourth Proportional to 87,127.20, 130,690.80 and 52,048.80

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Solution

The fourth proportional to 87,127.20, 130,690.80 and 52,048.80 is: 78,073.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,127.20 : 130,690.80 = 52,048.80 : x
  2. Step 2: Convert to fraction form
    87,127.20/130,690.80 = 52,048.80/x
  3. Step 3: Cross multiply
    87,127.20x = 130,690.80 × 52,048.80
  4. Step 4: Simplify right side
    87,127.20x = 6,802,299,311.04
  5. Step 5: Solve for x
    x = 6,802,299,311.04/87,127.20
  6. Step 6: Final answer
    x = 78,073.20

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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.