Home / 142,449.20-196,566.70-78,785.63

Finding the Fourth Proportional to 142,449.20, 196,566.70 and 78,785.63

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Solution

The fourth proportional to 142,449.20, 196,566.70 and 78,785.63 is: 108,716.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,449.20 : 196,566.70 = 78,785.63 : x
  2. Step 2: Convert to fraction form
    142,449.20/196,566.70 = 78,785.63/x
  3. Step 3: Cross multiply
    142,449.20x = 196,566.70 × 78,785.63
  4. Step 4: Simplify right side
    142,449.20x = 15,486,631,001.57
  5. Step 5: Solve for x
    x = 15,486,631,001.57/142,449.20
  6. Step 6: Final answer
    x = 108,716.87

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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.