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Finding the Fourth Proportional to 218,879.10, 328,328.49 and 67,065.06

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Solution

The fourth proportional to 218,879.10, 328,328.49 and 67,065.06 is: 100,600.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,879.10 : 328,328.49 = 67,065.06 : x
  2. Step 2: Convert to fraction form
    218,879.10/328,328.49 = 67,065.06/x
  3. Step 3: Cross multiply
    218,879.10x = 328,328.49 × 67,065.06
  4. Step 4: Simplify right side
    218,879.10x = 22,019,369,881.56
  5. Step 5: Solve for x
    x = 22,019,369,881.56/218,879.10
  6. Step 6: Final answer
    x = 100,600.60

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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.