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Finding the Fourth Proportional to 99,806.29, 149,787.64 and 69,624.21

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Solution

The fourth proportional to 99,806.29, 149,787.64 and 69,624.21 is: 104,490.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,806.29 : 149,787.64 = 69,624.21 : x
  2. Step 2: Convert to fraction form
    99,806.29/149,787.64 = 69,624.21/x
  3. Step 3: Cross multiply
    99,806.29x = 149,787.64 × 69,624.21
  4. Step 4: Simplify right side
    99,806.29x = 10,428,846,102.76
  5. Step 5: Solve for x
    x = 10,428,846,102.76/99,806.29
  6. Step 6: Final answer
    x = 104,490.87

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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.