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Finding the Fourth Proportional to 66,480.48, 91,915.92 and 63,542.88

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Solution

The fourth proportional to 66,480.48, 91,915.92 and 63,542.88 is: 87,854.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,480.48 : 91,915.92 = 63,542.88 : x
  2. Step 2: Convert to fraction form
    66,480.48/91,915.92 = 63,542.88/x
  3. Step 3: Cross multiply
    66,480.48x = 91,915.92 × 63,542.88
  4. Step 4: Simplify right side
    66,480.48x = 5,840,602,274.65
  5. Step 5: Solve for x
    x = 5,840,602,274.65/66,480.48
  6. Step 6: Final answer
    x = 87,854.39

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.