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Finding the Fourth Proportional to 115,293.88, 159,105.55 and 64,992.88

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Solution

The fourth proportional to 115,293.88, 159,105.55 and 64,992.88 is: 89,690.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,293.88 : 159,105.55 = 64,992.88 : x
  2. Step 2: Convert to fraction form
    115,293.88/159,105.55 = 64,992.88/x
  3. Step 3: Cross multiply
    115,293.88x = 159,105.55 × 64,992.88
  4. Step 4: Simplify right side
    115,293.88x = 10,340,727,122.96
  5. Step 5: Solve for x
    x = 10,340,727,122.96/115,293.88
  6. Step 6: Final answer
    x = 89,690.17

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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.