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Finding the Fourth Proportional to 218,699.90, 328,062.81 and 68,944.94

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Solution

The fourth proportional to 218,699.90, 328,062.81 and 68,944.94 is: 103,421.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,699.90 : 328,062.81 = 68,944.94 : x
  2. Step 2: Convert to fraction form
    218,699.90/328,062.81 = 68,944.94/x
  3. Step 3: Cross multiply
    218,699.90x = 328,062.81 × 68,944.94
  4. Step 4: Simplify right side
    218,699.90x = 22,618,270,751.68
  5. Step 5: Solve for x
    x = 22,618,270,751.68/218,699.90
  6. Step 6: Final answer
    x = 103,421.50

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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.