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Finding the Fourth Proportional to 69,708.58, 104,562.66 and 19,788.72

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Solution

The fourth proportional to 69,708.58, 104,562.66 and 19,788.72 is: 29,683.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,708.58 : 104,562.66 = 19,788.72 : x
  2. Step 2: Convert to fraction form
    69,708.58/104,562.66 = 19,788.72/x
  3. Step 3: Cross multiply
    69,708.58x = 104,562.66 × 19,788.72
  4. Step 4: Simplify right side
    69,708.58x = 2,069,161,201.20
  5. Step 5: Solve for x
    x = 2,069,161,201.20/69,708.58
  6. Step 6: Final answer
    x = 29,683.02

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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.