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Finding the Fourth Proportional to 72,081.65, 108,122.22 and 19,491.13

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Solution

The fourth proportional to 72,081.65, 108,122.22 and 19,491.13 is: 29,236.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,081.65 : 108,122.22 = 19,491.13 : x
  2. Step 2: Convert to fraction form
    72,081.65/108,122.22 = 19,491.13/x
  3. Step 3: Cross multiply
    72,081.65x = 108,122.22 × 19,491.13
  4. Step 4: Simplify right side
    72,081.65x = 2,107,424,245.91
  5. Step 5: Solve for x
    x = 2,107,424,245.91/72,081.65
  6. Step 6: Final answer
    x = 29,236.63

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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.