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Finding the Fourth Proportional to 102,700.80, 154,051.20 and 67,449.60

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Solution

The fourth proportional to 102,700.80, 154,051.20 and 67,449.60 is: 101,174.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,700.80 : 154,051.20 = 67,449.60 : x
  2. Step 2: Convert to fraction form
    102,700.80/154,051.20 = 67,449.60/x
  3. Step 3: Cross multiply
    102,700.80x = 154,051.20 × 67,449.60
  4. Step 4: Simplify right side
    102,700.80x = 10,390,691,819.52
  5. Step 5: Solve for x
    x = 10,390,691,819.52/102,700.80
  6. Step 6: Final answer
    x = 101,174.40

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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.