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Finding the Fourth Proportional to 131,125.20, 196,687.80 and 89,653.20

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Solution

The fourth proportional to 131,125.20, 196,687.80 and 89,653.20 is: 134,479.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,125.20 : 196,687.80 = 89,653.20 : x
  2. Step 2: Convert to fraction form
    131,125.20/196,687.80 = 89,653.20/x
  3. Step 3: Cross multiply
    131,125.20x = 196,687.80 × 89,653.20
  4. Step 4: Simplify right side
    131,125.20x = 17,633,690,670.96
  5. Step 5: Solve for x
    x = 17,633,690,670.96/131,125.20
  6. Step 6: Final answer
    x = 134,479.80

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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.