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Finding the Fourth Proportional to 83,221.60, 124,832.40 and 78,944.80

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Solution

The fourth proportional to 83,221.60, 124,832.40 and 78,944.80 is: 118,417.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,221.60 : 124,832.40 = 78,944.80 : x
  2. Step 2: Convert to fraction form
    83,221.60/124,832.40 = 78,944.80/x
  3. Step 3: Cross multiply
    83,221.60x = 124,832.40 × 78,944.80
  4. Step 4: Simplify right side
    83,221.60x = 9,854,868,851.52
  5. Step 5: Solve for x
    x = 9,854,868,851.52/83,221.60
  6. Step 6: Final answer
    x = 118,417.20

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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.