Home / 136,980.20-205,508.70-66,861.80

Finding the Fourth Proportional to 136,980.20, 205,508.70 and 66,861.80

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Solution

The fourth proportional to 136,980.20, 205,508.70 and 66,861.80 is: 100,311.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,980.20 : 205,508.70 = 66,861.80 : x
  2. Step 2: Convert to fraction form
    136,980.20/205,508.70 = 66,861.80/x
  3. Step 3: Cross multiply
    136,980.20x = 205,508.70 × 66,861.80
  4. Step 4: Simplify right side
    136,980.20x = 13,740,681,597.66
  5. Step 5: Solve for x
    x = 13,740,681,597.66/136,980.20
  6. Step 6: Final answer
    x = 100,311.44

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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.