Home / 142,275.07-196,343.56-78,616.97

Finding the Fourth Proportional to 142,275.07, 196,343.56 and 78,616.97

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Solution

The fourth proportional to 142,275.07, 196,343.56 and 78,616.97 is: 108,493.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,275.07 : 196,343.56 = 78,616.97 : x
  2. Step 2: Convert to fraction form
    142,275.07/196,343.56 = 78,616.97/x
  3. Step 3: Cross multiply
    142,275.07x = 196,343.56 × 78,616.97
  4. Step 4: Simplify right side
    142,275.07x = 15,435,935,766.21
  5. Step 5: Solve for x
    x = 15,435,935,766.21/142,275.07
  6. Step 6: Final answer
    x = 108,493.61

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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.