Home / 138,774.16-208,194.36-45,280

Finding the Fourth Proportional to 138,774.16, 208,194.36 and 45,280

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Solution

The fourth proportional to 138,774.16, 208,194.36 and 45,280 is: 67,930.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,774.16 : 208,194.36 = 45,280 : x
  2. Step 2: Convert to fraction form
    138,774.16/208,194.36 = 45,280/x
  3. Step 3: Cross multiply
    138,774.16x = 208,194.36 × 45,280
  4. Step 4: Simplify right side
    138,774.16x = 9,427,040,620.80
  5. Step 5: Solve for x
    x = 9,427,040,620.80/138,774.16
  6. Step 6: Final answer
    x = 67,930.81

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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.