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Finding the Fourth Proportional to 102,900.48, 154,348.92 and 28,019.40

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Solution

The fourth proportional to 102,900.48, 154,348.92 and 28,019.40 is: 42,028.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,900.48 : 154,348.92 = 28,019.40 : x
  2. Step 2: Convert to fraction form
    102,900.48/154,348.92 = 28,019.40/x
  3. Step 3: Cross multiply
    102,900.48x = 154,348.92 × 28,019.40
  4. Step 4: Simplify right side
    102,900.48x = 4,324,764,129.05
  5. Step 5: Solve for x
    x = 4,324,764,129.05/102,900.48
  6. Step 6: Final answer
    x = 42,028.61

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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.