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Finding the Fourth Proportional to 115,454.52, 159,328.08 and 67,708.80

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Solution

The fourth proportional to 115,454.52, 159,328.08 and 67,708.80 is: 93,438.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,454.52 : 159,328.08 = 67,708.80 : x
  2. Step 2: Convert to fraction form
    115,454.52/159,328.08 = 67,708.80/x
  3. Step 3: Cross multiply
    115,454.52x = 159,328.08 × 67,708.80
  4. Step 4: Simplify right side
    115,454.52x = 10,787,913,103.10
  5. Step 5: Solve for x
    x = 10,787,913,103.10/115,454.52
  6. Step 6: Final answer
    x = 93,438.64

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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.