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Finding the Fourth Proportional to 89,245.56, 133,689.80 and 53,687.28

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Solution

The fourth proportional to 89,245.56, 133,689.80 and 53,687.28 is: 80,423.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,245.56 : 133,689.80 = 53,687.28 : x
  2. Step 2: Convert to fraction form
    89,245.56/133,689.80 = 53,687.28/x
  3. Step 3: Cross multiply
    89,245.56x = 133,689.80 × 53,687.28
  4. Step 4: Simplify right side
    89,245.56x = 7,177,441,725.74
  5. Step 5: Solve for x
    x = 7,177,441,725.74/89,245.56
  6. Step 6: Final answer
    x = 80,423.52

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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.