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Finding the Fourth Proportional to 78,168.16, 117,193.92 and 36,605.44

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Solution

The fourth proportional to 78,168.16, 117,193.92 and 36,605.44 is: 54,880.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,168.16 : 117,193.92 = 36,605.44 : x
  2. Step 2: Convert to fraction form
    78,168.16/117,193.92 = 36,605.44/x
  3. Step 3: Cross multiply
    78,168.16x = 117,193.92 × 36,605.44
  4. Step 4: Simplify right side
    78,168.16x = 4,289,935,006.92
  5. Step 5: Solve for x
    x = 4,289,935,006.92/78,168.16
  6. Step 6: Final answer
    x = 54,880.85

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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.