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Finding the Fourth Proportional to 99,443.70, 149,165.55 and 76,893.30

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Solution

The fourth proportional to 99,443.70, 149,165.55 and 76,893.30 is: 115,339.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,443.70 : 149,165.55 = 76,893.30 : x
  2. Step 2: Convert to fraction form
    99,443.70/149,165.55 = 76,893.30/x
  3. Step 3: Cross multiply
    99,443.70x = 149,165.55 × 76,893.30
  4. Step 4: Simplify right side
    99,443.70x = 11,469,831,385.82
  5. Step 5: Solve for x
    x = 11,469,831,385.82/99,443.70
  6. Step 6: Final answer
    x = 115,339.95

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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.