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Finding the Fourth Proportional to 81,486.75, 112,458.20 and 47,959.23

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Solution

The fourth proportional to 81,486.75, 112,458.20 and 47,959.23 is: 66,187.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,486.75 : 112,458.20 = 47,959.23 : x
  2. Step 2: Convert to fraction form
    81,486.75/112,458.20 = 47,959.23/x
  3. Step 3: Cross multiply
    81,486.75x = 112,458.20 × 47,959.23
  4. Step 4: Simplify right side
    81,486.75x = 5,393,408,439.39
  5. Step 5: Solve for x
    x = 5,393,408,439.39/81,486.75
  6. Step 6: Final answer
    x = 66,187.55

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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.