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Finding the Fourth Proportional to 115,687.85, 159,648.17 and 64,699.97

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Solution

The fourth proportional to 115,687.85, 159,648.17 and 64,699.97 is: 89,285.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,687.85 : 159,648.17 = 64,699.97 : x
  2. Step 2: Convert to fraction form
    115,687.85/159,648.17 = 64,699.97/x
  3. Step 3: Cross multiply
    115,687.85x = 159,648.17 × 64,699.97
  4. Step 4: Simplify right side
    115,687.85x = 10,329,230,687.81
  5. Step 5: Solve for x
    x = 10,329,230,687.81/115,687.85
  6. Step 6: Final answer
    x = 89,285.36

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.