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Finding the Fourth Proportional to 77,079.61, 115,605.76 and 20,924.08

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Solution

The fourth proportional to 77,079.61, 115,605.76 and 20,924.08 is: 31,382.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,079.61 : 115,605.76 = 20,924.08 : x
  2. Step 2: Convert to fraction form
    77,079.61/115,605.76 = 20,924.08/x
  3. Step 3: Cross multiply
    77,079.61x = 115,605.76 × 20,924.08
  4. Step 4: Simplify right side
    77,079.61x = 2,418,944,170.70
  5. Step 5: Solve for x
    x = 2,418,944,170.70/77,079.61
  6. Step 6: Final answer
    x = 31,382.41

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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.