Home / 138,455.73-208,117.11-91,373.38

Finding the Fourth Proportional to 138,455.73, 208,117.11 and 91,373.38

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Solution

The fourth proportional to 138,455.73, 208,117.11 and 91,373.38 is: 137,346.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,455.73 : 208,117.11 = 91,373.38 : x
  2. Step 2: Convert to fraction form
    138,455.73/208,117.11 = 91,373.38/x
  3. Step 3: Cross multiply
    138,455.73x = 208,117.11 × 91,373.38
  4. Step 4: Simplify right side
    138,455.73x = 19,016,363,256.24
  5. Step 5: Solve for x
    x = 19,016,363,256.24/138,455.73
  6. Step 6: Final answer
    x = 137,346.16

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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.