Home / 83,815.60-125,723.40-74,630.20

Finding the Fourth Proportional to 83,815.60, 125,723.40 and 74,630.20

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Solution

The fourth proportional to 83,815.60, 125,723.40 and 74,630.20 is: 111,945.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,815.60 : 125,723.40 = 74,630.20 : x
  2. Step 2: Convert to fraction form
    83,815.60/125,723.40 = 74,630.20/x
  3. Step 3: Cross multiply
    83,815.60x = 125,723.40 × 74,630.20
  4. Step 4: Simplify right side
    83,815.60x = 9,382,762,486.68
  5. Step 5: Solve for x
    x = 9,382,762,486.68/83,815.60
  6. Step 6: Final answer
    x = 111,945.30

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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.