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Finding the Fourth Proportional to 60,664.20, 90,996.30 and 54,321.90

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Solution

The fourth proportional to 60,664.20, 90,996.30 and 54,321.90 is: 81,482.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,664.20 : 90,996.30 = 54,321.90 : x
  2. Step 2: Convert to fraction form
    60,664.20/90,996.30 = 54,321.90/x
  3. Step 3: Cross multiply
    60,664.20x = 90,996.30 × 54,321.90
  4. Step 4: Simplify right side
    60,664.20x = 4,943,091,908.97
  5. Step 5: Solve for x
    x = 4,943,091,908.97/60,664.20
  6. Step 6: Final answer
    x = 81,482.85

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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.