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Finding the Fourth Proportional to 115,905.96, 159,954.17 and 64,920.87

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Solution

The fourth proportional to 115,905.96, 159,954.17 and 64,920.87 is: 89,593.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,905.96 : 159,954.17 = 64,920.87 : x
  2. Step 2: Convert to fraction form
    115,905.96/159,954.17 = 64,920.87/x
  3. Step 3: Cross multiply
    115,905.96x = 159,954.17 × 64,920.87
  4. Step 4: Simplify right side
    115,905.96x = 10,384,363,551.92
  5. Step 5: Solve for x
    x = 10,384,363,551.92/115,905.96
  6. Step 6: Final answer
    x = 89,593.01

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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.