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Finding the Fourth Proportional to 60,972.80, 91,459.20 and 21,531.20

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Solution

The fourth proportional to 60,972.80, 91,459.20 and 21,531.20 is: 32,296.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,972.80 : 91,459.20 = 21,531.20 : x
  2. Step 2: Convert to fraction form
    60,972.80/91,459.20 = 21,531.20/x
  3. Step 3: Cross multiply
    60,972.80x = 91,459.20 × 21,531.20
  4. Step 4: Simplify right side
    60,972.80x = 1,969,226,327.04
  5. Step 5: Solve for x
    x = 1,969,226,327.04/60,972.80
  6. Step 6: Final answer
    x = 32,296.80

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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.