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Finding the Fourth Proportional to 115,640.22, 159,581.43 and 65,338.14

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Solution

The fourth proportional to 115,640.22, 159,581.43 and 65,338.14 is: 90,165.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,640.22 : 159,581.43 = 65,338.14 : x
  2. Step 2: Convert to fraction form
    115,640.22/159,581.43 = 65,338.14/x
  3. Step 3: Cross multiply
    115,640.22x = 159,581.43 × 65,338.14
  4. Step 4: Simplify right side
    115,640.22x = 10,426,753,814.74
  5. Step 5: Solve for x
    x = 10,426,753,814.74/115,640.22
  6. Step 6: Final answer
    x = 90,165.46

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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.