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Finding the Fourth Proportional to 99,121.46, 148,471.58 and 67,119.98

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Solution

The fourth proportional to 99,121.46, 148,471.58 and 67,119.98 is: 100,537.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,121.46 : 148,471.58 = 67,119.98 : x
  2. Step 2: Convert to fraction form
    99,121.46/148,471.58 = 67,119.98/x
  3. Step 3: Cross multiply
    99,121.46x = 148,471.58 × 67,119.98
  4. Step 4: Simplify right side
    99,121.46x = 9,965,409,480.17
  5. Step 5: Solve for x
    x = 9,965,409,480.17/99,121.46
  6. Step 6: Final answer
    x = 100,537.36

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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.