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Finding the Fourth Proportional to 74,005.71, 111,015.57 and 20,697.69

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Solution

The fourth proportional to 74,005.71, 111,015.57 and 20,697.69 is: 31,048.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,005.71 : 111,015.57 = 20,697.69 : x
  2. Step 2: Convert to fraction form
    74,005.71/111,015.57 = 20,697.69/x
  3. Step 3: Cross multiply
    74,005.71x = 111,015.57 × 20,697.69
  4. Step 4: Simplify right side
    74,005.71x = 2,297,765,749.54
  5. Step 5: Solve for x
    x = 2,297,765,749.54/74,005.71
  6. Step 6: Final answer
    x = 31,048.49

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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.