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Finding the Fourth Proportional to 243,221.52, 335,653.84 and 135,792.80

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Solution

The fourth proportional to 243,221.52, 335,653.84 and 135,792.80 is: 187,398.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    243,221.52 : 335,653.84 = 135,792.80 : x
  2. Step 2: Convert to fraction form
    243,221.52/335,653.84 = 135,792.80/x
  3. Step 3: Cross multiply
    243,221.52x = 335,653.84 × 135,792.80
  4. Step 4: Simplify right side
    243,221.52x = 45,579,374,764.35
  5. Step 5: Solve for x
    x = 45,579,374,764.35/243,221.52
  6. Step 6: Final answer
    x = 187,398.61

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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.