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Finding the Fourth Proportional to 78,369.12, 117,573.57 and 36,279.54

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Solution

The fourth proportional to 78,369.12, 117,573.57 and 36,279.54 is: 54,428.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,369.12 : 117,573.57 = 36,279.54 : x
  2. Step 2: Convert to fraction form
    78,369.12/117,573.57 = 36,279.54/x
  3. Step 3: Cross multiply
    78,369.12x = 117,573.57 × 36,279.54
  4. Step 4: Simplify right side
    78,369.12x = 4,265,515,035.76
  5. Step 5: Solve for x
    x = 4,265,515,035.76/78,369.12
  6. Step 6: Final answer
    x = 54,428.52

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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.