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Finding the Fourth Proportional to 115,020.72, 158,704.80 and 67,264.80

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Solution

The fourth proportional to 115,020.72, 158,704.80 and 67,264.80 is: 92,811.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,020.72 : 158,704.80 = 67,264.80 : x
  2. Step 2: Convert to fraction form
    115,020.72/158,704.80 = 67,264.80/x
  3. Step 3: Cross multiply
    115,020.72x = 158,704.80 × 67,264.80
  4. Step 4: Simplify right side
    115,020.72x = 10,675,246,631.04
  5. Step 5: Solve for x
    x = 10,675,246,631.04/115,020.72
  6. Step 6: Final answer
    x = 92,811.51

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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.