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Finding the Fourth Proportional to 83,813.60, 125,720.40 and 74,482.40

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Solution

The fourth proportional to 83,813.60, 125,720.40 and 74,482.40 is: 111,723.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,813.60 : 125,720.40 = 74,482.40 : x
  2. Step 2: Convert to fraction form
    83,813.60/125,720.40 = 74,482.40/x
  3. Step 3: Cross multiply
    83,813.60x = 125,720.40 × 74,482.40
  4. Step 4: Simplify right side
    83,813.60x = 9,363,957,120.96
  5. Step 5: Solve for x
    x = 9,363,957,120.96/83,813.60
  6. Step 6: Final answer
    x = 111,723.60

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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.