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Finding the Fourth Proportional to 218,821.09, 328,100.40 and 100,344.01

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Solution

The fourth proportional to 218,821.09, 328,100.40 and 100,344.01 is: 150,455.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,821.09 : 328,100.40 = 100,344.01 : x
  2. Step 2: Convert to fraction form
    218,821.09/328,100.40 = 100,344.01/x
  3. Step 3: Cross multiply
    218,821.09x = 328,100.40 × 100,344.01
  4. Step 4: Simplify right side
    218,821.09x = 32,922,909,818.60
  5. Step 5: Solve for x
    x = 32,922,909,818.60/218,821.09
  6. Step 6: Final answer
    x = 150,455.84

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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.