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Finding the Fourth Proportional to 79,638.40, 119,373.72 and 40,112.44

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Solution

The fourth proportional to 79,638.40, 119,373.72 and 40,112.44 is: 60,126.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,638.40 : 119,373.72 = 40,112.44 : x
  2. Step 2: Convert to fraction form
    79,638.40/119,373.72 = 40,112.44/x
  3. Step 3: Cross multiply
    79,638.40x = 119,373.72 × 40,112.44
  4. Step 4: Simplify right side
    79,638.40x = 4,788,371,181.08
  5. Step 5: Solve for x
    x = 4,788,371,181.08/79,638.40
  6. Step 6: Final answer
    x = 60,126.41

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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.