Home / 71,770.28-99,042.42-39,939.32

Finding the Fourth Proportional to 71,770.28, 99,042.42 and 39,939.32

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Solution

The fourth proportional to 71,770.28, 99,042.42 and 39,939.32 is: 55,115.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,770.28 : 99,042.42 = 39,939.32 : x
  2. Step 2: Convert to fraction form
    71,770.28/99,042.42 = 39,939.32/x
  3. Step 3: Cross multiply
    71,770.28x = 99,042.42 × 39,939.32
  4. Step 4: Simplify right side
    71,770.28x = 3,955,686,905.95
  5. Step 5: Solve for x
    x = 3,955,686,905.95/71,770.28
  6. Step 6: Final answer
    x = 55,115.95

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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.