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Finding the Fourth Proportional to 100,135.80, 138,177.90 and 59,841.54

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Solution

The fourth proportional to 100,135.80, 138,177.90 and 59,841.54 is: 82,575.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,135.80 : 138,177.90 = 59,841.54 : x
  2. Step 2: Convert to fraction form
    100,135.80/138,177.90 = 59,841.54/x
  3. Step 3: Cross multiply
    100,135.80x = 138,177.90 × 59,841.54
  4. Step 4: Simplify right side
    100,135.80x = 8,268,778,329.97
  5. Step 5: Solve for x
    x = 8,268,778,329.97/100,135.80
  6. Step 6: Final answer
    x = 82,575.65

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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.