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Finding the Fourth Proportional to 83,620.60, 125,430.90 and 74,435.20

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Solution

The fourth proportional to 83,620.60, 125,430.90 and 74,435.20 is: 111,652.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,620.60 : 125,430.90 = 74,435.20 : x
  2. Step 2: Convert to fraction form
    83,620.60/125,430.90 = 74,435.20/x
  3. Step 3: Cross multiply
    83,620.60x = 125,430.90 × 74,435.20
  4. Step 4: Simplify right side
    83,620.60x = 9,336,474,127.68
  5. Step 5: Solve for x
    x = 9,336,474,127.68/83,620.60
  6. Step 6: Final answer
    x = 111,652.80

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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.