Home / 142,902.57-197,208.26-78,367.72

Finding the Fourth Proportional to 142,902.57, 197,208.26 and 78,367.72

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Solution

The fourth proportional to 142,902.57, 197,208.26 and 78,367.72 is: 108,148.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,902.57 : 197,208.26 = 78,367.72 : x
  2. Step 2: Convert to fraction form
    142,902.57/197,208.26 = 78,367.72/x
  3. Step 3: Cross multiply
    142,902.57x = 197,208.26 × 78,367.72
  4. Step 4: Simplify right side
    142,902.57x = 15,454,761,920.97
  5. Step 5: Solve for x
    x = 15,454,761,920.97/142,902.57
  6. Step 6: Final answer
    x = 108,148.94

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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.