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Finding the Fourth Proportional to 121,520.60, 182,280.90 and 103,805.90

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Solution

The fourth proportional to 121,520.60, 182,280.90 and 103,805.90 is: 155,708.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,520.60 : 182,280.90 = 103,805.90 : x
  2. Step 2: Convert to fraction form
    121,520.60/182,280.90 = 103,805.90/x
  3. Step 3: Cross multiply
    121,520.60x = 182,280.90 × 103,805.90
  4. Step 4: Simplify right side
    121,520.60x = 18,921,832,877.31
  5. Step 5: Solve for x
    x = 18,921,832,877.31/121,520.60
  6. Step 6: Final answer
    x = 155,708.85

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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.