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Finding the Fourth Proportional to 218,844.70, 328,143.92 and 69,057.07

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Solution

The fourth proportional to 218,844.70, 328,143.92 and 69,057.07 is: 103,546.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,844.70 : 328,143.92 = 69,057.07 : x
  2. Step 2: Convert to fraction form
    218,844.70/328,143.92 = 69,057.07/x
  3. Step 3: Cross multiply
    218,844.70x = 328,143.92 × 69,057.07
  4. Step 4: Simplify right side
    218,844.70x = 22,660,655,667.51
  5. Step 5: Solve for x
    x = 22,660,655,667.51/218,844.70
  6. Step 6: Final answer
    x = 103,546.74

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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.