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Finding the Fourth Proportional to 99,543.80, 149,546.10 and 68,439.80

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Solution

The fourth proportional to 99,543.80, 149,546.10 and 68,439.80 is: 102,818.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,543.80 : 149,546.10 = 68,439.80 : x
  2. Step 2: Convert to fraction form
    99,543.80/149,546.10 = 68,439.80/x
  3. Step 3: Cross multiply
    99,543.80x = 149,546.10 × 68,439.80
  4. Step 4: Simplify right side
    99,543.80x = 10,234,905,174.78
  5. Step 5: Solve for x
    x = 10,234,905,174.78/99,543.80
  6. Step 6: Final answer
    x = 102,818.11

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1.5x scale

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.