Home / 80,881.32-121,758.70-72,743.58

Finding the Fourth Proportional to 80,881.32, 121,758.70 and 72,743.58

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Solution

The fourth proportional to 80,881.32, 121,758.70 and 72,743.58 is: 109,508.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,881.32 : 121,758.70 = 72,743.58 : x
  2. Step 2: Convert to fraction form
    80,881.32/121,758.70 = 72,743.58/x
  3. Step 3: Cross multiply
    80,881.32x = 121,758.70 × 72,743.58
  4. Step 4: Simplify right side
    80,881.32x = 8,857,163,734.15
  5. Step 5: Solve for x
    x = 8,857,163,734.15/80,881.32
  6. Step 6: Final answer
    x = 109,508.15

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.