Home / 99,381.28-149,071.92-68,121.76

Finding the Fourth Proportional to 99,381.28, 149,071.92 and 68,121.76

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Solution

The fourth proportional to 99,381.28, 149,071.92 and 68,121.76 is: 102,182.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,381.28 : 149,071.92 = 68,121.76 : x
  2. Step 2: Convert to fraction form
    99,381.28/149,071.92 = 68,121.76/x
  3. Step 3: Cross multiply
    99,381.28x = 149,071.92 × 68,121.76
  4. Step 4: Simplify right side
    99,381.28x = 10,155,041,556.98
  5. Step 5: Solve for x
    x = 10,155,041,556.98/99,381.28
  6. Step 6: Final answer
    x = 102,182.64

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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.