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Finding the Fourth Proportional to 79,486.16, 119,229 and 20,321.84

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Solution

The fourth proportional to 79,486.16, 119,229 and 20,321.84 is: 30,482.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,486.16 : 119,229 = 20,321.84 : x
  2. Step 2: Convert to fraction form
    79,486.16/119,229 = 20,321.84/x
  3. Step 3: Cross multiply
    79,486.16x = 119,229 × 20,321.84
  4. Step 4: Simplify right side
    79,486.16x = 2,422,952,661.36
  5. Step 5: Solve for x
    x = 2,422,952,661.36/79,486.16
  6. Step 6: Final answer
    x = 30,482.70

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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.