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Finding the Fourth Proportional to 66,734.60, 100,020.90 and 38,600.60

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Solution

The fourth proportional to 66,734.60, 100,020.90 and 38,600.60 is: 57,854.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,734.60 : 100,020.90 = 38,600.60 : x
  2. Step 2: Convert to fraction form
    66,734.60/100,020.90 = 38,600.60/x
  3. Step 3: Cross multiply
    66,734.60x = 100,020.90 × 38,600.60
  4. Step 4: Simplify right side
    66,734.60x = 3,860,866,752.54
  5. Step 5: Solve for x
    x = 3,860,866,752.54/66,734.60
  6. Step 6: Final answer
    x = 57,854.05

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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.