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Finding the Fourth Proportional to 81,891.85, 122,836.39 and 36,888.18

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Solution

The fourth proportional to 81,891.85, 122,836.39 and 36,888.18 is: 55,331.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,891.85 : 122,836.39 = 36,888.18 : x
  2. Step 2: Convert to fraction form
    81,891.85/122,836.39 = 36,888.18/x
  3. Step 3: Cross multiply
    81,891.85x = 122,836.39 × 36,888.18
  4. Step 4: Simplify right side
    81,891.85x = 4,531,210,864.87
  5. Step 5: Solve for x
    x = 4,531,210,864.87/81,891.85
  6. Step 6: Final answer
    x = 55,331.65

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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.