Home / 100,540.13-138,652.68-68,322.83

Finding the Fourth Proportional to 100,540.13, 138,652.68 and 68,322.83

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Solution

The fourth proportional to 100,540.13, 138,652.68 and 68,322.83 is: 94,222.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,540.13 : 138,652.68 = 68,322.83 : x
  2. Step 2: Convert to fraction form
    100,540.13/138,652.68 = 68,322.83/x
  3. Step 3: Cross multiply
    100,540.13x = 138,652.68 × 68,322.83
  4. Step 4: Simplify right side
    100,540.13x = 9,473,143,484.68
  5. Step 5: Solve for x
    x = 9,473,143,484.68/100,540.13
  6. Step 6: Final answer
    x = 94,222.51

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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.