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Finding the Fourth Proportional to 218,977.80, 328,515.30 and 100,620.60

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Solution

The fourth proportional to 218,977.80, 328,515.30 and 100,620.60 is: 150,953.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,977.80 : 328,515.30 = 100,620.60 : x
  2. Step 2: Convert to fraction form
    218,977.80/328,515.30 = 100,620.60/x
  3. Step 3: Cross multiply
    218,977.80x = 328,515.30 × 100,620.60
  4. Step 4: Simplify right side
    218,977.80x = 33,055,406,595.18
  5. Step 5: Solve for x
    x = 33,055,406,595.18/218,977.80
  6. Step 6: Final answer
    x = 150,953.23

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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.