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Finding the Fourth Proportional to 99,872.70, 149,614.65 and 60,312.30

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Solution

The fourth proportional to 99,872.70, 149,614.65 and 60,312.30 is: 90,351.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,872.70 : 149,614.65 = 60,312.30 : x
  2. Step 2: Convert to fraction form
    99,872.70/149,614.65 = 60,312.30/x
  3. Step 3: Cross multiply
    99,872.70x = 149,614.65 × 60,312.30
  4. Step 4: Simplify right side
    99,872.70x = 9,023,603,655.20
  5. Step 5: Solve for x
    x = 9,023,603,655.20/99,872.70
  6. Step 6: Final answer
    x = 90,351.05

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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.