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Finding the Fourth Proportional to 83,117.80, 124,676.70 and 74,132.20

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Solution

The fourth proportional to 83,117.80, 124,676.70 and 74,132.20 is: 111,198.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,117.80 : 124,676.70 = 74,132.20 : x
  2. Step 2: Convert to fraction form
    83,117.80/124,676.70 = 74,132.20/x
  3. Step 3: Cross multiply
    83,117.80x = 124,676.70 × 74,132.20
  4. Step 4: Simplify right side
    83,117.80x = 9,242,558,059.74
  5. Step 5: Solve for x
    x = 9,242,558,059.74/83,117.80
  6. Step 6: Final answer
    x = 111,198.30

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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.