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Finding the Fourth Proportional to 218,767.52, 328,158.21 and 69,009.14

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Solution

The fourth proportional to 218,767.52, 328,158.21 and 69,009.14 is: 103,515.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,767.52 : 328,158.21 = 69,009.14 : x
  2. Step 2: Convert to fraction form
    218,767.52/328,158.21 = 69,009.14/x
  3. Step 3: Cross multiply
    218,767.52x = 328,158.21 × 69,009.14
  4. Step 4: Simplify right side
    218,767.52x = 22,645,915,856.04
  5. Step 5: Solve for x
    x = 22,645,915,856.04/218,767.52
  6. Step 6: Final answer
    x = 103,515.90

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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.