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Finding the Fourth Proportional to 64,505.57, 89,016.37 and 36,211.25

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Solution

The fourth proportional to 64,505.57, 89,016.37 and 36,211.25 is: 49,970.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,505.57 : 89,016.37 = 36,211.25 : x
  2. Step 2: Convert to fraction form
    64,505.57/89,016.37 = 36,211.25/x
  3. Step 3: Cross multiply
    64,505.57x = 89,016.37 × 36,211.25
  4. Step 4: Simplify right side
    64,505.57x = 3,223,394,160.18
  5. Step 5: Solve for x
    x = 3,223,394,160.18/64,505.57
  6. Step 6: Final answer
    x = 49,970.79

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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.