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Finding the Fourth Proportional to 122,987.15, 169,719.20 and 69,268.95

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Solution

The fourth proportional to 122,987.15, 169,719.20 and 69,268.95 is: 95,589.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,987.15 : 169,719.20 = 69,268.95 : x
  2. Step 2: Convert to fraction form
    122,987.15/169,719.20 = 69,268.95/x
  3. Step 3: Cross multiply
    122,987.15x = 169,719.20 × 69,268.95
  4. Step 4: Simplify right side
    122,987.15x = 11,756,270,432.50
  5. Step 5: Solve for x
    x = 11,756,270,432.50/122,987.15
  6. Step 6: Final answer
    x = 95,589.42

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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.