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Finding the Fourth Proportional to 131,518.80, 197,278.20 and 84,279.60

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Solution

The fourth proportional to 131,518.80, 197,278.20 and 84,279.60 is: 126,419.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,518.80 : 197,278.20 = 84,279.60 : x
  2. Step 2: Convert to fraction form
    131,518.80/197,278.20 = 84,279.60/x
  3. Step 3: Cross multiply
    131,518.80x = 197,278.20 × 84,279.60
  4. Step 4: Simplify right side
    131,518.80x = 16,626,527,784.72
  5. Step 5: Solve for x
    x = 16,626,527,784.72/131,518.80
  6. Step 6: Final answer
    x = 126,419.40

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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.