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Finding the Fourth Proportional to 178,819.20, 268,401.60 and 90,172.80

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Solution

The fourth proportional to 178,819.20, 268,401.60 and 90,172.80 is: 135,346.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    178,819.20 : 268,401.60 = 90,172.80 : x
  2. Step 2: Convert to fraction form
    178,819.20/268,401.60 = 90,172.80/x
  3. Step 3: Cross multiply
    178,819.20x = 268,401.60 × 90,172.80
  4. Step 4: Simplify right side
    178,819.20x = 24,202,523,796.48
  5. Step 5: Solve for x
    x = 24,202,523,796.48/178,819.20
  6. Step 6: Final answer
    x = 135,346.34

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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.