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Finding the Fourth Proportional to 147,121.60, 220,528.80 and 80,459.20

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Solution

The fourth proportional to 147,121.60, 220,528.80 and 80,459.20 is: 120,604.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    147,121.60 : 220,528.80 = 80,459.20 : x
  2. Step 2: Convert to fraction form
    147,121.60/220,528.80 = 80,459.20/x
  3. Step 3: Cross multiply
    147,121.60x = 220,528.80 × 80,459.20
  4. Step 4: Simplify right side
    147,121.60x = 17,743,570,824.96
  5. Step 5: Solve for x
    x = 17,743,570,824.96/147,121.60
  6. Step 6: Final answer
    x = 120,604.80

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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.