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Finding the Fourth Proportional to 82,793.70, 124,190.55 and 78,711.30

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Solution

The fourth proportional to 82,793.70, 124,190.55 and 78,711.30 is: 118,066.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,793.70 : 124,190.55 = 78,711.30 : x
  2. Step 2: Convert to fraction form
    82,793.70/124,190.55 = 78,711.30/x
  3. Step 3: Cross multiply
    82,793.70x = 124,190.55 × 78,711.30
  4. Step 4: Simplify right side
    82,793.70x = 9,775,199,638.22
  5. Step 5: Solve for x
    x = 9,775,199,638.22/82,793.70
  6. Step 6: Final answer
    x = 118,066.95

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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.