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Finding the Fourth Proportional to 243,397.72, 335,864.70 and 135,965.44

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Solution

The fourth proportional to 243,397.72, 335,864.70 and 135,965.44 is: 187,618.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    243,397.72 : 335,864.70 = 135,965.44 : x
  2. Step 2: Convert to fraction form
    243,397.72/335,864.70 = 135,965.44/x
  3. Step 3: Cross multiply
    243,397.72x = 335,864.70 × 135,965.44
  4. Step 4: Simplify right side
    243,397.72x = 45,665,991,715.97
  5. Step 5: Solve for x
    x = 45,665,991,715.97/243,397.72
  6. Step 6: Final answer
    x = 187,618.81

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1.5x scale

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.