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Finding the Fourth Proportional to 73,121.99, 109,690.18 and 30,418.65

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Solution

The fourth proportional to 73,121.99, 109,690.18 and 30,418.65 is: 45,630.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,121.99 : 109,690.18 = 30,418.65 : x
  2. Step 2: Convert to fraction form
    73,121.99/109,690.18 = 30,418.65/x
  3. Step 3: Cross multiply
    73,121.99x = 109,690.18 × 30,418.65
  4. Step 4: Simplify right side
    73,121.99x = 3,336,627,117.81
  5. Step 5: Solve for x
    x = 3,336,627,117.81/73,121.99
  6. Step 6: Final answer
    x = 45,630.97

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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.