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Finding the Fourth Proportional to 100,091.98, 138,103.68 and 59,818.78

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Solution

The fourth proportional to 100,091.98, 138,103.68 and 59,818.78 is: 82,536.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,091.98 : 138,103.68 = 59,818.78 : x
  2. Step 2: Convert to fraction form
    100,091.98/138,103.68 = 59,818.78/x
  3. Step 3: Cross multiply
    100,091.98x = 138,103.68 × 59,818.78
  4. Step 4: Simplify right side
    100,091.98x = 8,261,193,651.11
  5. Step 5: Solve for x
    x = 8,261,193,651.11/100,091.98
  6. Step 6: Final answer
    x = 82,536.02

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.