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Finding the Fourth Proportional to 143,599.92, 198,121.32 and 79,925.28

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Solution

The fourth proportional to 143,599.92, 198,121.32 and 79,925.28 is: 110,270.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,599.92 : 198,121.32 = 79,925.28 : x
  2. Step 2: Convert to fraction form
    143,599.92/198,121.32 = 79,925.28/x
  3. Step 3: Cross multiply
    143,599.92x = 198,121.32 × 79,925.28
  4. Step 4: Simplify right side
    143,599.92x = 15,834,901,974.97
  5. Step 5: Solve for x
    x = 15,834,901,974.97/143,599.92
  6. Step 6: Final answer
    x = 110,270.97

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1.5x scale

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.