Home / 138,881.38-208,331.88-68,741.86

Finding the Fourth Proportional to 138,881.38, 208,331.88 and 68,741.86

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Solution

The fourth proportional to 138,881.38, 208,331.88 and 68,741.86 is: 103,117.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,881.38 : 208,331.88 = 68,741.86 : x
  2. Step 2: Convert to fraction form
    138,881.38/208,331.88 = 68,741.86/x
  3. Step 3: Cross multiply
    138,881.38x = 208,331.88 × 68,741.86
  4. Step 4: Simplify right side
    138,881.38x = 14,321,120,928.50
  5. Step 5: Solve for x
    x = 14,321,120,928.50/138,881.38
  6. Step 6: Final answer
    x = 103,117.65

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.