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Finding the Fourth Proportional to 87,009.80, 130,514.70 and 74,325.20

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Solution

The fourth proportional to 87,009.80, 130,514.70 and 74,325.20 is: 111,487.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,009.80 : 130,514.70 = 74,325.20 : x
  2. Step 2: Convert to fraction form
    87,009.80/130,514.70 = 74,325.20/x
  3. Step 3: Cross multiply
    87,009.80x = 130,514.70 × 74,325.20
  4. Step 4: Simplify right side
    87,009.80x = 9,700,531,180.44
  5. Step 5: Solve for x
    x = 9,700,531,180.44/87,009.80
  6. Step 6: Final answer
    x = 111,487.80

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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.