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Finding the Fourth Proportional to 80,532.61, 120,798.75 and 20,561.05

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Solution

The fourth proportional to 80,532.61, 120,798.75 and 20,561.05 is: 30,841.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,532.61 : 120,798.75 = 20,561.05 : x
  2. Step 2: Convert to fraction form
    80,532.61/120,798.75 = 20,561.05/x
  3. Step 3: Cross multiply
    80,532.61x = 120,798.75 × 20,561.05
  4. Step 4: Simplify right side
    80,532.61x = 2,483,749,138.69
  5. Step 5: Solve for x
    x = 2,483,749,138.69/80,532.61
  6. Step 6: Final answer
    x = 30,841.53

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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.