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Finding the Fourth Proportional to 115,288.65, 159,074.15 and 69,990.48

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Solution

The fourth proportional to 115,288.65, 159,074.15 and 69,990.48 is: 96,572.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,288.65 : 159,074.15 = 69,990.48 : x
  2. Step 2: Convert to fraction form
    115,288.65/159,074.15 = 69,990.48/x
  3. Step 3: Cross multiply
    115,288.65x = 159,074.15 × 69,990.48
  4. Step 4: Simplify right side
    115,288.65x = 11,133,675,764.14
  5. Step 5: Solve for x
    x = 11,133,675,764.14/115,288.65
  6. Step 6: Final answer
    x = 96,572.18

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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.