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Finding the Fourth Proportional to 80,618.61, 120,927.53 and 20,646.97

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Solution

The fourth proportional to 80,618.61, 120,927.53 and 20,646.97 is: 30,970.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,618.61 : 120,927.53 = 20,646.97 : x
  2. Step 2: Convert to fraction form
    80,618.61/120,927.53 = 20,646.97/x
  3. Step 3: Cross multiply
    80,618.61x = 120,927.53 × 20,646.97
  4. Step 4: Simplify right side
    80,618.61x = 2,496,786,833.38
  5. Step 5: Solve for x
    x = 2,496,786,833.38/80,618.61
  6. Step 6: Final answer
    x = 30,970.35

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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.