Home / 81,172.51-112,049.38-72,659.61

Finding the Fourth Proportional to 81,172.51, 112,049.38 and 72,659.61

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Solution

The fourth proportional to 81,172.51, 112,049.38 and 72,659.61 is: 100,298.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,172.51 : 112,049.38 = 72,659.61 : x
  2. Step 2: Convert to fraction form
    81,172.51/112,049.38 = 72,659.61/x
  3. Step 3: Cross multiply
    81,172.51x = 112,049.38 × 72,659.61
  4. Step 4: Simplify right side
    81,172.51x = 8,141,464,251.54
  5. Step 5: Solve for x
    x = 8,141,464,251.54/81,172.51
  6. Step 6: Final answer
    x = 100,298.29

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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.