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Finding the Fourth Proportional to 243,130.45, 335,536.92 and 135,721.45

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Solution

The fourth proportional to 243,130.45, 335,536.92 and 135,721.45 is: 187,305.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    243,130.45 : 335,536.92 = 135,721.45 : x
  2. Step 2: Convert to fraction form
    243,130.45/335,536.92 = 135,721.45/x
  3. Step 3: Cross multiply
    243,130.45x = 335,536.92 × 135,721.45
  4. Step 4: Simplify right side
    243,130.45x = 45,539,557,310.93
  5. Step 5: Solve for x
    x = 45,539,557,310.93/243,130.45
  6. Step 6: Final answer
    x = 187,305.03

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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.