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Finding the Fourth Proportional to 69,570.72, 104,356.80 and 28,008

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Solution

The fourth proportional to 69,570.72, 104,356.80 and 28,008 is: 42,012.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,570.72 : 104,356.80 = 28,008 : x
  2. Step 2: Convert to fraction form
    69,570.72/104,356.80 = 28,008/x
  3. Step 3: Cross multiply
    69,570.72x = 104,356.80 × 28,008
  4. Step 4: Simplify right side
    69,570.72x = 2,922,825,254.40
  5. Step 5: Solve for x
    x = 2,922,825,254.40/69,570.72
  6. Step 6: Final answer
    x = 42,012.29

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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.