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Finding the Fourth Proportional to 69,051.99, 103,580.22 and 19,132.58

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Solution

The fourth proportional to 69,051.99, 103,580.22 and 19,132.58 is: 28,699.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,051.99 : 103,580.22 = 19,132.58 : x
  2. Step 2: Convert to fraction form
    69,051.99/103,580.22 = 19,132.58/x
  3. Step 3: Cross multiply
    69,051.99x = 103,580.22 × 19,132.58
  4. Step 4: Simplify right side
    69,051.99x = 1,981,756,327.67
  5. Step 5: Solve for x
    x = 1,981,756,327.67/69,051.99
  6. Step 6: Final answer
    x = 28,699.48

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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.