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Finding the Fourth Proportional to 110,280.80, 165,421.20 and 100,431.20

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Solution

The fourth proportional to 110,280.80, 165,421.20 and 100,431.20 is: 150,646.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    110,280.80 : 165,421.20 = 100,431.20 : x
  2. Step 2: Convert to fraction form
    110,280.80/165,421.20 = 100,431.20/x
  3. Step 3: Cross multiply
    110,280.80x = 165,421.20 × 100,431.20
  4. Step 4: Simplify right side
    110,280.80x = 16,613,449,621.44
  5. Step 5: Solve for x
    x = 16,613,449,621.44/110,280.80
  6. Step 6: Final answer
    x = 150,646.80

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1.5x scale

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.