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Finding the Fourth Proportional to 79,640.40, 119,376.72 and 40,114.44

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Solution

The fourth proportional to 79,640.40, 119,376.72 and 40,114.44 is: 60,129.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,640.40 : 119,376.72 = 40,114.44 : x
  2. Step 2: Convert to fraction form
    79,640.40/119,376.72 = 40,114.44/x
  3. Step 3: Cross multiply
    79,640.40x = 119,376.72 × 40,114.44
  4. Step 4: Simplify right side
    79,640.40x = 4,788,730,271.84
  5. Step 5: Solve for x
    x = 4,788,730,271.84/79,640.40
  6. Step 6: Final answer
    x = 60,129.41

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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.