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Finding the Fourth Proportional to 81,495.01, 122,095.87 and 76,687.76

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Solution

The fourth proportional to 81,495.01, 122,095.87 and 76,687.76 is: 114,893.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,495.01 : 122,095.87 = 76,687.76 : x
  2. Step 2: Convert to fraction form
    81,495.01/122,095.87 = 76,687.76/x
  3. Step 3: Cross multiply
    81,495.01x = 122,095.87 × 76,687.76
  4. Step 4: Simplify right side
    81,495.01x = 9,363,259,320.44
  5. Step 5: Solve for x
    x = 9,363,259,320.44/81,495.01
  6. Step 6: Final answer
    x = 114,893.65

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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.