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Finding the Fourth Proportional to 122,379.92, 168,983.88 and 99,722.32

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Solution

The fourth proportional to 122,379.92, 168,983.88 and 99,722.32 is: 137,697.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,379.92 : 168,983.88 = 99,722.32 : x
  2. Step 2: Convert to fraction form
    122,379.92/168,983.88 = 99,722.32/x
  3. Step 3: Cross multiply
    122,379.92x = 168,983.88 × 99,722.32
  4. Step 4: Simplify right side
    122,379.92x = 16,851,464,556.20
  5. Step 5: Solve for x
    x = 16,851,464,556.20/122,379.92
  6. Step 6: Final answer
    x = 137,697.95

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.