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Finding the Fourth Proportional to 66,251.20, 99,376.80 and 61,844.80

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Solution

The fourth proportional to 66,251.20, 99,376.80 and 61,844.80 is: 92,767.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,251.20 : 99,376.80 = 61,844.80 : x
  2. Step 2: Convert to fraction form
    66,251.20/99,376.80 = 61,844.80/x
  3. Step 3: Cross multiply
    66,251.20x = 99,376.80 × 61,844.80
  4. Step 4: Simplify right side
    66,251.20x = 6,145,938,320.64
  5. Step 5: Solve for x
    x = 6,145,938,320.64/66,251.20
  6. Step 6: Final answer
    x = 92,767.20

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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.