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Finding the Fourth Proportional to 99,612.70, 149,412.57 and 40,453.54

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Solution

The fourth proportional to 99,612.70, 149,412.57 and 40,453.54 is: 60,677.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,612.70 : 149,412.57 = 40,453.54 : x
  2. Step 2: Convert to fraction form
    99,612.70/149,412.57 = 40,453.54/x
  3. Step 3: Cross multiply
    99,612.70x = 149,412.57 × 40,453.54
  4. Step 4: Simplify right side
    99,612.70x = 6,044,267,377.00
  5. Step 5: Solve for x
    x = 6,044,267,377.00/99,612.70
  6. Step 6: Final answer
    x = 60,677.68

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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.