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Finding the Fourth Proportional to 91,446.80, 137,170.20 and 90,863.60

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Solution

The fourth proportional to 91,446.80, 137,170.20 and 90,863.60 is: 136,295.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,446.80 : 137,170.20 = 90,863.60 : x
  2. Step 2: Convert to fraction form
    91,446.80/137,170.20 = 90,863.60/x
  3. Step 3: Cross multiply
    91,446.80x = 137,170.20 × 90,863.60
  4. Step 4: Simplify right side
    91,446.80x = 12,463,778,184.72
  5. Step 5: Solve for x
    x = 12,463,778,184.72/91,446.80
  6. Step 6: Final answer
    x = 136,295.40

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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.