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Finding the Fourth Proportional to 79,990.84, 110,391.96 and 48,170

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Solution

The fourth proportional to 79,990.84, 110,391.96 and 48,170 is: 66,477.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,990.84 : 110,391.96 = 48,170 : x
  2. Step 2: Convert to fraction form
    79,990.84/110,391.96 = 48,170/x
  3. Step 3: Cross multiply
    79,990.84x = 110,391.96 × 48,170
  4. Step 4: Simplify right side
    79,990.84x = 5,317,580,713.20
  5. Step 5: Solve for x
    x = 5,317,580,713.20/79,990.84
  6. Step 6: Final answer
    x = 66,477.37

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.