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Finding the Fourth Proportional to 81,937.80, 122,944.97 and 42,473.39

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Solution

The fourth proportional to 81,937.80, 122,944.97 and 42,473.39 is: 63,729.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,937.80 : 122,944.97 = 42,473.39 : x
  2. Step 2: Convert to fraction form
    81,937.80/122,944.97 = 42,473.39/x
  3. Step 3: Cross multiply
    81,937.80x = 122,944.97 × 42,473.39
  4. Step 4: Simplify right side
    81,937.80x = 5,221,888,832.26
  5. Step 5: Solve for x
    x = 5,221,888,832.26/81,937.80
  6. Step 6: Final answer
    x = 63,729.91

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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.