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Finding the Fourth Proportional to 99,909.82, 149,860.61 and 55,508.25

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Solution

The fourth proportional to 99,909.82, 149,860.61 and 55,508.25 is: 83,260.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,909.82 : 149,860.61 = 55,508.25 : x
  2. Step 2: Convert to fraction form
    99,909.82/149,860.61 = 55,508.25/x
  3. Step 3: Cross multiply
    99,909.82x = 149,860.61 × 55,508.25
  4. Step 4: Simplify right side
    99,909.82x = 8,318,499,927.49
  5. Step 5: Solve for x
    x = 8,318,499,927.49/99,909.82
  6. Step 6: Final answer
    x = 83,260.09

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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.