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Finding the Fourth Proportional to 247,082.72, 340,971.71 and 138,185.87

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Solution

The fourth proportional to 247,082.72, 340,971.71 and 138,185.87 is: 190,695.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    247,082.72 : 340,971.71 = 138,185.87 : x
  2. Step 2: Convert to fraction form
    247,082.72/340,971.71 = 138,185.87/x
  3. Step 3: Cross multiply
    247,082.72x = 340,971.71 × 138,185.87
  4. Step 4: Simplify right side
    247,082.72x = 47,117,469,995.95
  5. Step 5: Solve for x
    x = 47,117,469,995.95/247,082.72
  6. Step 6: Final answer
    x = 190,695.13

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.