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Finding the Fourth Proportional to 99,364.78, 149,108.73 and 40,200.90

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Solution

The fourth proportional to 99,364.78, 149,108.73 and 40,200.90 is: 60,326.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,364.78 : 149,108.73 = 40,200.90 : x
  2. Step 2: Convert to fraction form
    99,364.78/149,108.73 = 40,200.90/x
  3. Step 3: Cross multiply
    99,364.78x = 149,108.73 × 40,200.90
  4. Step 4: Simplify right side
    99,364.78x = 5,994,305,143.86
  5. Step 5: Solve for x
    x = 5,994,305,143.86/99,364.78
  6. Step 6: Final answer
    x = 60,326.26

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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.