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Finding the Fourth Proportional to 168,140.95, 252,074.13 and 78,239.86

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Solution

The fourth proportional to 168,140.95, 252,074.13 and 78,239.86 is: 117,295.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    168,140.95 : 252,074.13 = 78,239.86 : x
  2. Step 2: Convert to fraction form
    168,140.95/252,074.13 = 78,239.86/x
  3. Step 3: Cross multiply
    168,140.95x = 252,074.13 × 78,239.86
  4. Step 4: Simplify right side
    168,140.95x = 19,722,244,640.82
  5. Step 5: Solve for x
    x = 19,722,244,640.82/168,140.95
  6. Step 6: Final answer
    x = 117,295.90

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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.