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Finding the Fourth Proportional to 64,702.85, 89,289.77 and 36,408.56

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Solution

The fourth proportional to 64,702.85, 89,289.77 and 36,408.56 is: 50,243.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,702.85 : 89,289.77 = 36,408.56 : x
  2. Step 2: Convert to fraction form
    64,702.85/89,289.77 = 36,408.56/x
  3. Step 3: Cross multiply
    64,702.85x = 89,289.77 × 36,408.56
  4. Step 4: Simplify right side
    64,702.85x = 3,250,911,319.94
  5. Step 5: Solve for x
    x = 3,250,911,319.94/64,702.85
  6. Step 6: Final answer
    x = 50,243.72

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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.