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Finding the Fourth Proportional to 66,781.33, 100,177.20 and 19,397.21

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Solution

The fourth proportional to 66,781.33, 100,177.20 and 19,397.21 is: 29,097.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,781.33 : 100,177.20 = 19,397.21 : x
  2. Step 2: Convert to fraction form
    66,781.33/100,177.20 = 19,397.21/x
  3. Step 3: Cross multiply
    66,781.33x = 100,177.20 × 19,397.21
  4. Step 4: Simplify right side
    66,781.33x = 1,943,157,684.73
  5. Step 5: Solve for x
    x = 1,943,157,684.73/66,781.33
  6. Step 6: Final answer
    x = 29,097.32

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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.