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Finding the Fourth Proportional to 69,228.90, 104,060.12 and 45,687.71

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Solution

The fourth proportional to 69,228.90, 104,060.12 and 45,687.71 is: 68,674.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,228.90 : 104,060.12 = 45,687.71 : x
  2. Step 2: Convert to fraction form
    69,228.90/104,060.12 = 45,687.71/x
  3. Step 3: Cross multiply
    69,228.90x = 104,060.12 × 45,687.71
  4. Step 4: Simplify right side
    69,228.90x = 4,754,268,616.84
  5. Step 5: Solve for x
    x = 4,754,268,616.84/69,228.90
  6. Step 6: Final answer
    x = 68,674.62

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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.