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Finding the Fourth Proportional to 218,845.32, 328,144.85 and 69,057.69

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Solution

The fourth proportional to 218,845.32, 328,144.85 and 69,057.69 is: 103,547.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,845.32 : 328,144.85 = 69,057.69 : x
  2. Step 2: Convert to fraction form
    218,845.32/328,144.85 = 69,057.69/x
  3. Step 3: Cross multiply
    218,845.32x = 328,144.85 × 69,057.69
  4. Step 4: Simplify right side
    218,845.32x = 22,660,925,499.04
  5. Step 5: Solve for x
    x = 22,660,925,499.04/218,845.32
  6. Step 6: Final answer
    x = 103,547.68

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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.