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Finding the Fourth Proportional to 83,040.60, 124,560.90 and 78,447.90

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Solution

The fourth proportional to 83,040.60, 124,560.90 and 78,447.90 is: 117,671.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,040.60 : 124,560.90 = 78,447.90 : x
  2. Step 2: Convert to fraction form
    83,040.60/124,560.90 = 78,447.90/x
  3. Step 3: Cross multiply
    83,040.60x = 124,560.90 × 78,447.90
  4. Step 4: Simplify right side
    83,040.60x = 9,771,541,027.11
  5. Step 5: Solve for x
    x = 9,771,541,027.11/83,040.60
  6. Step 6: Final answer
    x = 117,671.85

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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.