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Finding the Fourth Proportional to 69,018.57, 103,486.02 and 45,020.82

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Solution

The fourth proportional to 69,018.57, 103,486.02 and 45,020.82 is: 67,503.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,018.57 : 103,486.02 = 45,020.82 : x
  2. Step 2: Convert to fraction form
    69,018.57/103,486.02 = 45,020.82/x
  3. Step 3: Cross multiply
    69,018.57x = 103,486.02 × 45,020.82
  4. Step 4: Simplify right side
    69,018.57x = 4,659,025,478.94
  5. Step 5: Solve for x
    x = 4,659,025,478.94/69,018.57
  6. Step 6: Final answer
    x = 67,503.94

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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.