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Finding the Fourth Proportional to 65,657.96, 90,622.50 and 40,169.96

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Solution

The fourth proportional to 65,657.96, 90,622.50 and 40,169.96 is: 55,443.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,657.96 : 90,622.50 = 40,169.96 : x
  2. Step 2: Convert to fraction form
    65,657.96/90,622.50 = 40,169.96/x
  3. Step 3: Cross multiply
    65,657.96x = 90,622.50 × 40,169.96
  4. Step 4: Simplify right side
    65,657.96x = 3,640,302,200.10
  5. Step 5: Solve for x
    x = 3,640,302,200.10/65,657.96
  6. Step 6: Final answer
    x = 55,443.43

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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.