Home / 138,793.10-208,141.05-72,211.10

Finding the Fourth Proportional to 138,793.10, 208,141.05 and 72,211.10

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Solution

The fourth proportional to 138,793.10, 208,141.05 and 72,211.10 is: 108,291.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,793.10 : 208,141.05 = 72,211.10 : x
  2. Step 2: Convert to fraction form
    138,793.10/208,141.05 = 72,211.10/x
  3. Step 3: Cross multiply
    138,793.10x = 208,141.05 × 72,211.10
  4. Step 4: Simplify right side
    138,793.10x = 15,030,094,175.66
  5. Step 5: Solve for x
    x = 15,030,094,175.66/138,793.10
  6. Step 6: Final answer
    x = 108,291.36

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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.