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Finding the Fourth Proportional to 66,766.80, 100,265.40 and 64,693.20

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Solution

The fourth proportional to 66,766.80, 100,265.40 and 64,693.20 is: 97,151.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,766.80 : 100,265.40 = 64,693.20 : x
  2. Step 2: Convert to fraction form
    66,766.80/100,265.40 = 64,693.20/x
  3. Step 3: Cross multiply
    66,766.80x = 100,265.40 × 64,693.20
  4. Step 4: Simplify right side
    66,766.80x = 6,486,489,575.28
  5. Step 5: Solve for x
    x = 6,486,489,575.28/66,766.80
  6. Step 6: Final answer
    x = 97,151.42

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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.