Home / 138,456.10-208,117.67-91,373.76

Finding the Fourth Proportional to 138,456.10, 208,117.67 and 91,373.76

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Solution

The fourth proportional to 138,456.10, 208,117.67 and 91,373.76 is: 137,346.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,456.10 : 208,117.67 = 91,373.76 : x
  2. Step 2: Convert to fraction form
    138,456.10/208,117.67 = 91,373.76/x
  3. Step 3: Cross multiply
    138,456.10x = 208,117.67 × 91,373.76
  4. Step 4: Simplify right side
    138,456.10x = 19,016,493,478.33
  5. Step 5: Solve for x
    x = 19,016,493,478.33/138,456.10
  6. Step 6: Final answer
    x = 137,346.74

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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.