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Finding the Fourth Proportional to 87,231.60, 130,701.60 and 74,692.80

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Solution

The fourth proportional to 87,231.60, 130,701.60 and 74,692.80 is: 111,914.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,231.60 : 130,701.60 = 74,692.80 : x
  2. Step 2: Convert to fraction form
    87,231.60/130,701.60 = 74,692.80/x
  3. Step 3: Cross multiply
    87,231.60x = 130,701.60 × 74,692.80
  4. Step 4: Simplify right side
    87,231.60x = 9,762,468,468.48
  5. Step 5: Solve for x
    x = 9,762,468,468.48/87,231.60
  6. Step 6: Final answer
    x = 111,914.36

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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.