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Finding the Fourth Proportional to 239,161, 330,042.18 and 138,617.32

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Solution

The fourth proportional to 239,161, 330,042.18 and 138,617.32 is: 191,291.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    239,161 : 330,042.18 = 138,617.32 : x
  2. Step 2: Convert to fraction form
    239,161/330,042.18 = 138,617.32/x
  3. Step 3: Cross multiply
    239,161x = 330,042.18 × 138,617.32
  4. Step 4: Simplify right side
    239,161x = 45,749,562,478.56
  5. Step 5: Solve for x
    x = 45,749,562,478.56/239,161
  6. Step 6: Final answer
    x = 191,291.90

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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.