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Finding the Fourth Proportional to 83,078.60, 124,617.90 and 60,771.20

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Solution

The fourth proportional to 83,078.60, 124,617.90 and 60,771.20 is: 91,156.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,078.60 : 124,617.90 = 60,771.20 : x
  2. Step 2: Convert to fraction form
    83,078.60/124,617.90 = 60,771.20/x
  3. Step 3: Cross multiply
    83,078.60x = 124,617.90 × 60,771.20
  4. Step 4: Simplify right side
    83,078.60x = 7,573,179,324.48
  5. Step 5: Solve for x
    x = 7,573,179,324.48/83,078.60
  6. Step 6: Final answer
    x = 91,156.80

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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.