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Finding the Fourth Proportional to 80,308.53, 120,452.58 and 21,148.83

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Solution

The fourth proportional to 80,308.53, 120,452.58 and 21,148.83 is: 31,720.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,308.53 : 120,452.58 = 21,148.83 : x
  2. Step 2: Convert to fraction form
    80,308.53/120,452.58 = 21,148.83/x
  3. Step 3: Cross multiply
    80,308.53x = 120,452.58 × 21,148.83
  4. Step 4: Simplify right side
    80,308.53x = 2,547,431,137.48
  5. Step 5: Solve for x
    x = 2,547,431,137.48/80,308.53
  6. Step 6: Final answer
    x = 31,720.55

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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.