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Finding the Fourth Proportional to 109,993.45, 151,793.10 and 71,777.45

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Solution

The fourth proportional to 109,993.45, 151,793.10 and 71,777.45 is: 99,054.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,993.45 : 151,793.10 = 71,777.45 : x
  2. Step 2: Convert to fraction form
    109,993.45/151,793.10 = 71,777.45/x
  3. Step 3: Cross multiply
    109,993.45x = 151,793.10 × 71,777.45
  4. Step 4: Simplify right side
    109,993.45x = 10,895,321,155.79
  5. Step 5: Solve for x
    x = 10,895,321,155.79/109,993.45
  6. Step 6: Final answer
    x = 99,054.27

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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.