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Finding the Fourth Proportional to 99,427.92, 149,141.84 and 81,860.82

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Solution

The fourth proportional to 99,427.92, 149,141.84 and 81,860.82 is: 122,791.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,427.92 : 149,141.84 = 81,860.82 : x
  2. Step 2: Convert to fraction form
    99,427.92/149,141.84 = 81,860.82/x
  3. Step 3: Cross multiply
    99,427.92x = 149,141.84 × 81,860.82
  4. Step 4: Simplify right side
    99,427.92x = 12,208,872,909.40
  5. Step 5: Solve for x
    x = 12,208,872,909.40/99,427.92
  6. Step 6: Final answer
    x = 122,791.19

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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.