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Finding the Fourth Proportional to 154,489.90, 213,216.18 and 86,532.84

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Solution

The fourth proportional to 154,489.90, 213,216.18 and 86,532.84 is: 119,426.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,489.90 : 213,216.18 = 86,532.84 : x
  2. Step 2: Convert to fraction form
    154,489.90/213,216.18 = 86,532.84/x
  3. Step 3: Cross multiply
    154,489.90x = 213,216.18 × 86,532.84
  4. Step 4: Simplify right side
    154,489.90x = 18,450,201,589.35
  5. Step 5: Solve for x
    x = 18,450,201,589.35/154,489.90
  6. Step 6: Final answer
    x = 119,426.59

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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.