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Finding the Fourth Proportional to 285,972.48, 428,679.86 and 136,172.56

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Solution

The fourth proportional to 285,972.48, 428,679.86 and 136,172.56 is: 204,126.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,972.48 : 428,679.86 = 136,172.56 : x
  2. Step 2: Convert to fraction form
    285,972.48/428,679.86 = 136,172.56/x
  3. Step 3: Cross multiply
    285,972.48x = 428,679.86 × 136,172.56
  4. Step 4: Simplify right side
    285,972.48x = 58,374,433,956.64
  5. Step 5: Solve for x
    x = 58,374,433,956.64/285,972.48
  6. Step 6: Final answer
    x = 204,126.05

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.