Home / 77,304.43-115,960.14-21,143.28

Finding the Fourth Proportional to 77,304.43, 115,960.14 and 21,143.28

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Solution

The fourth proportional to 77,304.43, 115,960.14 and 21,143.28 is: 31,715.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,304.43 : 115,960.14 = 21,143.28 : x
  2. Step 2: Convert to fraction form
    77,304.43/115,960.14 = 21,143.28/x
  3. Step 3: Cross multiply
    77,304.43x = 115,960.14 × 21,143.28
  4. Step 4: Simplify right side
    77,304.43x = 2,451,777,708.86
  5. Step 5: Solve for x
    x = 2,451,777,708.86/77,304.43
  6. Step 6: Final answer
    x = 31,715.88

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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.