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Finding the Fourth Proportional to 99,601.80, 149,429.10 and 43,417.80

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Solution

The fourth proportional to 99,601.80, 149,429.10 and 43,417.80 is: 65,138.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,601.80 : 149,429.10 = 43,417.80 : x
  2. Step 2: Convert to fraction form
    99,601.80/149,429.10 = 43,417.80/x
  3. Step 3: Cross multiply
    99,601.80x = 149,429.10 × 43,417.80
  4. Step 4: Simplify right side
    99,601.80x = 6,487,882,777.98
  5. Step 5: Solve for x
    x = 6,487,882,777.98/99,601.80
  6. Step 6: Final answer
    x = 65,138.21

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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.