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Finding the Fourth Proportional to 111,503.80, 167,255.70 and 90,508.60

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Solution

The fourth proportional to 111,503.80, 167,255.70 and 90,508.60 is: 135,762.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,503.80 : 167,255.70 = 90,508.60 : x
  2. Step 2: Convert to fraction form
    111,503.80/167,255.70 = 90,508.60/x
  3. Step 3: Cross multiply
    111,503.80x = 167,255.70 × 90,508.60
  4. Step 4: Simplify right side
    111,503.80x = 15,138,079,249.02
  5. Step 5: Solve for x
    x = 15,138,079,249.02/111,503.80
  6. Step 6: Final answer
    x = 135,762.90

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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.