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Finding the Fourth Proportional to 69,283.20, 103,927.92 and 21,248.28

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Solution

The fourth proportional to 69,283.20, 103,927.92 and 21,248.28 is: 31,873.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,283.20 : 103,927.92 = 21,248.28 : x
  2. Step 2: Convert to fraction form
    69,283.20/103,927.92 = 21,248.28/x
  3. Step 3: Cross multiply
    69,283.20x = 103,927.92 × 21,248.28
  4. Step 4: Simplify right side
    69,283.20x = 2,208,289,543.98
  5. Step 5: Solve for x
    x = 2,208,289,543.98/69,283.20
  6. Step 6: Final answer
    x = 31,873.38

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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.