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Finding the Fourth Proportional to 218,780.82, 328,226.57 and 61,009.29

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Solution

The fourth proportional to 218,780.82, 328,226.57 and 61,009.29 is: 91,529.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,780.82 : 328,226.57 = 61,009.29 : x
  2. Step 2: Convert to fraction form
    218,780.82/328,226.57 = 61,009.29/x
  3. Step 3: Cross multiply
    218,780.82x = 328,226.57 × 61,009.29
  4. Step 4: Simplify right side
    218,780.82x = 20,024,869,689.79
  5. Step 5: Solve for x
    x = 20,024,869,689.79/218,780.82
  6. Step 6: Final answer
    x = 91,529.37

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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.