Home / 77,891.20-107,489.94-42,081.28

Finding the Fourth Proportional to 77,891.20, 107,489.94 and 42,081.28

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Solution

The fourth proportional to 77,891.20, 107,489.94 and 42,081.28 is: 58,072.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,891.20 : 107,489.94 = 42,081.28 : x
  2. Step 2: Convert to fraction form
    77,891.20/107,489.94 = 42,081.28/x
  3. Step 3: Cross multiply
    77,891.20x = 107,489.94 × 42,081.28
  4. Step 4: Simplify right side
    77,891.20x = 4,523,314,262.32
  5. Step 5: Solve for x
    x = 4,523,314,262.32/77,891.20
  6. Step 6: Final answer
    x = 58,072.21

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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.