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Finding the Fourth Proportional to 218,810.70, 328,216.08 and 69,062.64

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Solution

The fourth proportional to 218,810.70, 328,216.08 and 69,062.64 is: 103,593.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,810.70 : 328,216.08 = 69,062.64 : x
  2. Step 2: Convert to fraction form
    218,810.70/328,216.08 = 69,062.64/x
  3. Step 3: Cross multiply
    218,810.70x = 328,216.08 × 69,062.64
  4. Step 4: Simplify right side
    218,810.70x = 22,667,468,975.25
  5. Step 5: Solve for x
    x = 22,667,468,975.25/218,810.70
  6. Step 6: Final answer
    x = 103,593.97

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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.