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Finding the Fourth Proportional to 73,019.71, 109,529.79 and 20,429.65

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Solution

The fourth proportional to 73,019.71, 109,529.79 and 20,429.65 is: 30,644.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,019.71 : 109,529.79 = 20,429.65 : x
  2. Step 2: Convert to fraction form
    73,019.71/109,529.79 = 20,429.65/x
  3. Step 3: Cross multiply
    73,019.71x = 109,529.79 × 20,429.65
  4. Step 4: Simplify right side
    73,019.71x = 2,237,655,274.27
  5. Step 5: Solve for x
    x = 2,237,655,274.27/73,019.71
  6. Step 6: Final answer
    x = 30,644.54

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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.