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Finding the Fourth Proportional to 66,435.20, 99,652.80 and 54,915.20

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Solution

The fourth proportional to 66,435.20, 99,652.80 and 54,915.20 is: 82,372.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,435.20 : 99,652.80 = 54,915.20 : x
  2. Step 2: Convert to fraction form
    66,435.20/99,652.80 = 54,915.20/x
  3. Step 3: Cross multiply
    66,435.20x = 99,652.80 × 54,915.20
  4. Step 4: Simplify right side
    66,435.20x = 5,472,453,442.56
  5. Step 5: Solve for x
    x = 5,472,453,442.56/66,435.20
  6. Step 6: Final answer
    x = 82,372.80

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1.5x scale

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.