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Finding the Fourth Proportional to 245,781.18, 339,174.27 and 138,350.88

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Solution

The fourth proportional to 245,781.18, 339,174.27 and 138,350.88 is: 190,922.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,781.18 : 339,174.27 = 138,350.88 : x
  2. Step 2: Convert to fraction form
    245,781.18/339,174.27 = 138,350.88/x
  3. Step 3: Cross multiply
    245,781.18x = 339,174.27 × 138,350.88
  4. Step 4: Simplify right side
    245,781.18x = 46,925,058,727.86
  5. Step 5: Solve for x
    x = 46,925,058,727.86/245,781.18
  6. Step 6: Final answer
    x = 190,922.10

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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.