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Finding the Fourth Proportional to 64,702.80, 89,289.54 and 36,408.69

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Solution

The fourth proportional to 64,702.80, 89,289.54 and 36,408.69 is: 50,243.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,702.80 : 89,289.54 = 36,408.69 : x
  2. Step 2: Convert to fraction form
    64,702.80/89,289.54 = 36,408.69/x
  3. Step 3: Cross multiply
    64,702.80x = 89,289.54 × 36,408.69
  4. Step 4: Simplify right side
    64,702.80x = 3,250,915,182.10
  5. Step 5: Solve for x
    x = 3,250,915,182.10/64,702.80
  6. Step 6: Final answer
    x = 50,243.81

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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.