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Finding the Fourth Proportional to 69,052.68, 103,581.24 and 19,128.51

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Solution

The fourth proportional to 69,052.68, 103,581.24 and 19,128.51 is: 28,693.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,052.68 : 103,581.24 = 19,128.51 : x
  2. Step 2: Convert to fraction form
    69,052.68/103,581.24 = 19,128.51/x
  3. Step 3: Cross multiply
    69,052.68x = 103,581.24 × 19,128.51
  4. Step 4: Simplify right side
    69,052.68x = 1,981,354,785.15
  5. Step 5: Solve for x
    x = 1,981,354,785.15/69,052.68
  6. Step 6: Final answer
    x = 28,693.38

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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.