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Finding the Fourth Proportional to 90,625.80, 135,938.70 and 75,863.55

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Solution

The fourth proportional to 90,625.80, 135,938.70 and 75,863.55 is: 113,795.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,625.80 : 135,938.70 = 75,863.55 : x
  2. Step 2: Convert to fraction form
    90,625.80/135,938.70 = 75,863.55/x
  3. Step 3: Cross multiply
    90,625.80x = 135,938.70 × 75,863.55
  4. Step 4: Simplify right side
    90,625.80x = 10,312,792,364.39
  5. Step 5: Solve for x
    x = 10,312,792,364.39/90,625.80
  6. Step 6: Final answer
    x = 113,795.33

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.