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Finding the Fourth Proportional to 81,290.64, 112,218.73 and 47,286.74

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Solution

The fourth proportional to 81,290.64, 112,218.73 and 47,286.74 is: 65,277.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,290.64 : 112,218.73 = 47,286.74 : x
  2. Step 2: Convert to fraction form
    81,290.64/112,218.73 = 47,286.74/x
  3. Step 3: Cross multiply
    81,290.64x = 112,218.73 × 47,286.74
  4. Step 4: Simplify right side
    81,290.64x = 5,306,457,229.33
  5. Step 5: Solve for x
    x = 5,306,457,229.33/81,290.64
  6. Step 6: Final answer
    x = 65,277.59

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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.