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Finding the Fourth Proportional to 100,794.80, 151,192.20 and 81,111.80

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Solution

The fourth proportional to 100,794.80, 151,192.20 and 81,111.80 is: 121,667.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,794.80 : 151,192.20 = 81,111.80 : x
  2. Step 2: Convert to fraction form
    100,794.80/151,192.20 = 81,111.80/x
  3. Step 3: Cross multiply
    100,794.80x = 151,192.20 × 81,111.80
  4. Step 4: Simplify right side
    100,794.80x = 12,263,471,487.96
  5. Step 5: Solve for x
    x = 12,263,471,487.96/100,794.80
  6. Step 6: Final answer
    x = 121,667.70

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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.