Home / 138,513.23-208,203.30-91,430.97

Finding the Fourth Proportional to 138,513.23, 208,203.30 and 91,430.97

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Solution

The fourth proportional to 138,513.23, 208,203.30 and 91,430.97 is: 137,432.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,513.23 : 208,203.30 = 91,430.97 : x
  2. Step 2: Convert to fraction form
    138,513.23/208,203.30 = 91,430.97/x
  3. Step 3: Cross multiply
    138,513.23x = 208,203.30 × 91,430.97
  4. Step 4: Simplify right side
    138,513.23x = 19,036,229,676.20
  5. Step 5: Solve for x
    x = 19,036,229,676.20/138,513.23
  6. Step 6: Final answer
    x = 137,432.57

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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.