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Finding the Fourth Proportional to 78,359.57, 117,436.68 and 36,234.30

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Solution

The fourth proportional to 78,359.57, 117,436.68 and 36,234.30 is: 54,303.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,359.57 : 117,436.68 = 36,234.30 : x
  2. Step 2: Convert to fraction form
    78,359.57/117,436.68 = 36,234.30/x
  3. Step 3: Cross multiply
    78,359.57x = 117,436.68 × 36,234.30
  4. Step 4: Simplify right side
    78,359.57x = 4,255,235,894.12
  5. Step 5: Solve for x
    x = 4,255,235,894.12/78,359.57
  6. Step 6: Final answer
    x = 54,303.97

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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.