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Finding the Fourth Proportional to 154,398.20, 213,073.34 and 86,414.60

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Solution

The fourth proportional to 154,398.20, 213,073.34 and 86,414.60 is: 119,254.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,398.20 : 213,073.34 = 86,414.60 : x
  2. Step 2: Convert to fraction form
    154,398.20/213,073.34 = 86,414.60/x
  3. Step 3: Cross multiply
    154,398.20x = 213,073.34 × 86,414.60
  4. Step 4: Simplify right side
    154,398.20x = 18,412,647,446.76
  5. Step 5: Solve for x
    x = 18,412,647,446.76/154,398.20
  6. Step 6: Final answer
    x = 119,254.29

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.