Home / 138,145.68-190,641.33-81,560.70

Finding the Fourth Proportional to 138,145.68, 190,641.33 and 81,560.70

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Solution

The fourth proportional to 138,145.68, 190,641.33 and 81,560.70 is: 112,553.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,145.68 : 190,641.33 = 81,560.70 : x
  2. Step 2: Convert to fraction form
    138,145.68/190,641.33 = 81,560.70/x
  3. Step 3: Cross multiply
    138,145.68x = 190,641.33 × 81,560.70
  4. Step 4: Simplify right side
    138,145.68x = 15,548,840,323.73
  5. Step 5: Solve for x
    x = 15,548,840,323.73/138,145.68
  6. Step 6: Final answer
    x = 112,553.94

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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.