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Finding the Fourth Proportional to 115,245.81, 159,069.33 and 75,069.81

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Solution

The fourth proportional to 115,245.81, 159,069.33 and 75,069.81 is: 103,615.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,245.81 : 159,069.33 = 75,069.81 : x
  2. Step 2: Convert to fraction form
    115,245.81/159,069.33 = 75,069.81/x
  3. Step 3: Cross multiply
    115,245.81x = 159,069.33 × 75,069.81
  4. Step 4: Simplify right side
    115,245.81x = 11,941,304,379.93
  5. Step 5: Solve for x
    x = 11,941,304,379.93/115,245.81
  6. Step 6: Final answer
    x = 103,615.95

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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.