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Finding the Fourth Proportional to 202,890.80, 304,336.20 and 69,759.20

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Solution

The fourth proportional to 202,890.80, 304,336.20 and 69,759.20 is: 104,638.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    202,890.80 : 304,336.20 = 69,759.20 : x
  2. Step 2: Convert to fraction form
    202,890.80/304,336.20 = 69,759.20/x
  3. Step 3: Cross multiply
    202,890.80x = 304,336.20 × 69,759.20
  4. Step 4: Simplify right side
    202,890.80x = 21,230,249,843.04
  5. Step 5: Solve for x
    x = 21,230,249,843.04/202,890.80
  6. Step 6: Final answer
    x = 104,638.80

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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.