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Finding the Fourth Proportional to 84,549.60, 126,856.80 and 83,221.20

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Solution

The fourth proportional to 84,549.60, 126,856.80 and 83,221.20 is: 124,863.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,549.60 : 126,856.80 = 83,221.20 : x
  2. Step 2: Convert to fraction form
    84,549.60/126,856.80 = 83,221.20/x
  3. Step 3: Cross multiply
    84,549.60x = 126,856.80 × 83,221.20
  4. Step 4: Simplify right side
    84,549.60x = 10,557,175,124.16
  5. Step 5: Solve for x
    x = 10,557,175,124.16/84,549.60
  6. Step 6: Final answer
    x = 124,863.69

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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.