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Finding the Fourth Proportional to 87,009.60, 130,708.80 and 83,704.80

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Solution

The fourth proportional to 87,009.60, 130,708.80 and 83,704.80 is: 125,744.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,009.60 : 130,708.80 = 83,704.80 : x
  2. Step 2: Convert to fraction form
    87,009.60/130,708.80 = 83,704.80/x
  3. Step 3: Cross multiply
    87,009.60x = 130,708.80 × 83,704.80
  4. Step 4: Simplify right side
    87,009.60x = 10,940,953,962.24
  5. Step 5: Solve for x
    x = 10,940,953,962.24/87,009.60
  6. Step 6: Final answer
    x = 125,744.22

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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.