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Finding the Fourth Proportional to 65,680.75, 90,641.60 and 35,872.75

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Solution

The fourth proportional to 65,680.75, 90,641.60 and 35,872.75 is: 49,505.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,680.75 : 90,641.60 = 35,872.75 : x
  2. Step 2: Convert to fraction form
    65,680.75/90,641.60 = 35,872.75/x
  3. Step 3: Cross multiply
    65,680.75x = 90,641.60 × 35,872.75
  4. Step 4: Simplify right side
    65,680.75x = 3,251,563,456.40
  5. Step 5: Solve for x
    x = 3,251,563,456.40/65,680.75
  6. Step 6: Final answer
    x = 49,505.58

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1.5x scale

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.