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Finding the Fourth Proportional to 243,418.16, 335,930.04 and 135,990.56

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Solution

The fourth proportional to 243,418.16, 335,930.04 and 135,990.56 is: 187,674.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    243,418.16 : 335,930.04 = 135,990.56 : x
  2. Step 2: Convert to fraction form
    243,418.16/335,930.04 = 135,990.56/x
  3. Step 3: Cross multiply
    243,418.16x = 335,930.04 × 135,990.56
  4. Step 4: Simplify right side
    243,418.16x = 45,683,314,260.42
  5. Step 5: Solve for x
    x = 45,683,314,260.42/243,418.16
  6. Step 6: Final answer
    x = 187,674.22

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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.