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Finding the Fourth Proportional to 115,864, 159,892.32 and 62,872

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Solution

The fourth proportional to 115,864, 159,892.32 and 62,872 is: 86,763.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,864 : 159,892.32 = 62,872 : x
  2. Step 2: Convert to fraction form
    115,864/159,892.32 = 62,872/x
  3. Step 3: Cross multiply
    115,864x = 159,892.32 × 62,872
  4. Step 4: Simplify right side
    115,864x = 10,052,749,943.04
  5. Step 5: Solve for x
    x = 10,052,749,943.04/115,864
  6. Step 6: Final answer
    x = 86,763.36

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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.