Home / 138,660.12-191,350.80-74,997.72

Finding the Fourth Proportional to 138,660.12, 191,350.80 and 74,997.72

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Solution

The fourth proportional to 138,660.12, 191,350.80 and 74,997.72 is: 103,496.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,660.12 : 191,350.80 = 74,997.72 : x
  2. Step 2: Convert to fraction form
    138,660.12/191,350.80 = 74,997.72/x
  3. Step 3: Cross multiply
    138,660.12x = 191,350.80 × 74,997.72
  4. Step 4: Simplify right side
    138,660.12x = 14,350,873,720.18
  5. Step 5: Solve for x
    x = 14,350,873,720.18/138,660.12
  6. Step 6: Final answer
    x = 103,496.76

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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.