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Finding the Fourth Proportional to 218,904.18, 328,374.90 and 69,104.40

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Solution

The fourth proportional to 218,904.18, 328,374.90 and 69,104.40 is: 103,662.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,904.18 : 328,374.90 = 69,104.40 : x
  2. Step 2: Convert to fraction form
    218,904.18/328,374.90 = 69,104.40/x
  3. Step 3: Cross multiply
    218,904.18x = 328,374.90 × 69,104.40
  4. Step 4: Simplify right side
    218,904.18x = 22,692,150,439.56
  5. Step 5: Solve for x
    x = 22,692,150,439.56/218,904.18
  6. Step 6: Final answer
    x = 103,662.48

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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.