Home / 138,788.80-208,161.60-38,939.20

Finding the Fourth Proportional to 138,788.80, 208,161.60 and 38,939.20

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Solution

The fourth proportional to 138,788.80, 208,161.60 and 38,939.20 is: 58,402.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,788.80 : 208,161.60 = 38,939.20 : x
  2. Step 2: Convert to fraction form
    138,788.80/208,161.60 = 38,939.20/x
  3. Step 3: Cross multiply
    138,788.80x = 208,161.60 × 38,939.20
  4. Step 4: Simplify right side
    138,788.80x = 8,105,646,174.72
  5. Step 5: Solve for x
    x = 8,105,646,174.72/138,788.80
  6. Step 6: Final answer
    x = 58,402.74

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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.