Home / 138,886.72-208,342.38-39,047.78

Finding the Fourth Proportional to 138,886.72, 208,342.38 and 39,047.78

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Solution

The fourth proportional to 138,886.72, 208,342.38 and 39,047.78 is: 58,575.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,886.72 : 208,342.38 = 39,047.78 : x
  2. Step 2: Convert to fraction form
    138,886.72/208,342.38 = 39,047.78/x
  3. Step 3: Cross multiply
    138,886.72x = 208,342.38 × 39,047.78
  4. Step 4: Simplify right side
    138,886.72x = 8,135,306,377.20
  5. Step 5: Solve for x
    x = 8,135,306,377.20/138,886.72
  6. Step 6: Final answer
    x = 58,575.12

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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.