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Finding the Fourth Proportional to 135,307.88, 202,728.46 and 89,687.56

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Solution

The fourth proportional to 135,307.88, 202,728.46 and 89,687.56 is: 134,376.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,307.88 : 202,728.46 = 89,687.56 : x
  2. Step 2: Convert to fraction form
    135,307.88/202,728.46 = 89,687.56/x
  3. Step 3: Cross multiply
    135,307.88x = 202,728.46 × 89,687.56
  4. Step 4: Simplify right side
    135,307.88x = 18,182,220,919.96
  5. Step 5: Solve for x
    x = 18,182,220,919.96/135,307.88
  6. Step 6: Final answer
    x = 134,376.66

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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.