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Finding the Fourth Proportional to 243,256.50, 335,653.92 and 135,809.28

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Solution

The fourth proportional to 243,256.50, 335,653.92 and 135,809.28 is: 187,394.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    243,256.50 : 335,653.92 = 135,809.28 : x
  2. Step 2: Convert to fraction form
    243,256.50/335,653.92 = 135,809.28/x
  3. Step 3: Cross multiply
    243,256.50x = 335,653.92 × 135,809.28
  4. Step 4: Simplify right side
    243,256.50x = 45,584,917,204.38
  5. Step 5: Solve for x
    x = 45,584,917,204.38/243,256.50
  6. Step 6: Final answer
    x = 187,394.45

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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.