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Finding the Fourth Proportional to 247,021.92, 340,894.17 and 138,138.48

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Solution

The fourth proportional to 247,021.92, 340,894.17 and 138,138.48 is: 190,633.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    247,021.92 : 340,894.17 = 138,138.48 : x
  2. Step 2: Convert to fraction form
    247,021.92/340,894.17 = 138,138.48/x
  3. Step 3: Cross multiply
    247,021.92x = 340,894.17 × 138,138.48
  4. Step 4: Simplify right side
    247,021.92x = 47,090,602,484.66
  5. Step 5: Solve for x
    x = 47,090,602,484.66/247,021.92
  6. Step 6: Final answer
    x = 190,633.29

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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.