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Finding the Fourth Proportional to 66,425.90, 99,658.26 and 21,446.20

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Solution

The fourth proportional to 66,425.90, 99,658.26 and 21,446.20 is: 32,175.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,425.90 : 99,658.26 = 21,446.20 : x
  2. Step 2: Convert to fraction form
    66,425.90/99,658.26 = 21,446.20/x
  3. Step 3: Cross multiply
    66,425.90x = 99,658.26 × 21,446.20
  4. Step 4: Simplify right side
    66,425.90x = 2,137,290,975.61
  5. Step 5: Solve for x
    x = 2,137,290,975.61/66,425.90
  6. Step 6: Final answer
    x = 32,175.57

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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.