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Finding the Fourth Proportional to 110,207.20, 165,310.80 and 103,640.80

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Solution

The fourth proportional to 110,207.20, 165,310.80 and 103,640.80 is: 155,461.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    110,207.20 : 165,310.80 = 103,640.80 : x
  2. Step 2: Convert to fraction form
    110,207.20/165,310.80 = 103,640.80/x
  3. Step 3: Cross multiply
    110,207.20x = 165,310.80 × 103,640.80
  4. Step 4: Simplify right side
    110,207.20x = 17,132,943,560.64
  5. Step 5: Solve for x
    x = 17,132,943,560.64/110,207.20
  6. Step 6: Final answer
    x = 155,461.20

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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.