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Finding the Fourth Proportional to 218,929.72, 328,392.64 and 69,170.02

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Solution

The fourth proportional to 218,929.72, 328,392.64 and 69,170.02 is: 103,754.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,929.72 : 328,392.64 = 69,170.02 : x
  2. Step 2: Convert to fraction form
    218,929.72/328,392.64 = 69,170.02/x
  3. Step 3: Cross multiply
    218,929.72x = 328,392.64 × 69,170.02
  4. Step 4: Simplify right side
    218,929.72x = 22,714,925,476.65
  5. Step 5: Solve for x
    x = 22,714,925,476.65/218,929.72
  6. Step 6: Final answer
    x = 103,754.42

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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.