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Finding the Fourth Proportional to 110,431.20, 165,646.80 and 75,439.20

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Solution

The fourth proportional to 110,431.20, 165,646.80 and 75,439.20 is: 113,158.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    110,431.20 : 165,646.80 = 75,439.20 : x
  2. Step 2: Convert to fraction form
    110,431.20/165,646.80 = 75,439.20/x
  3. Step 3: Cross multiply
    110,431.20x = 165,646.80 × 75,439.20
  4. Step 4: Simplify right side
    110,431.20x = 12,496,262,074.56
  5. Step 5: Solve for x
    x = 12,496,262,074.56/110,431.20
  6. Step 6: Final answer
    x = 113,158.80

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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.