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Finding the Fourth Proportional to 81,268.88, 112,154.76 and 49,432.40

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Solution

The fourth proportional to 81,268.88, 112,154.76 and 49,432.40 is: 68,218.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,268.88 : 112,154.76 = 49,432.40 : x
  2. Step 2: Convert to fraction form
    81,268.88/112,154.76 = 49,432.40/x
  3. Step 3: Cross multiply
    81,268.88x = 112,154.76 × 49,432.40
  4. Step 4: Simplify right side
    81,268.88x = 5,544,078,958.22
  5. Step 5: Solve for x
    x = 5,544,078,958.22/81,268.88
  6. Step 6: Final answer
    x = 68,218.97

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1.5x scale

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.