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Finding the Fourth Proportional to 69,018.36, 103,485.72 and 45,020.59

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Solution

The fourth proportional to 69,018.36, 103,485.72 and 45,020.59 is: 67,503.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,018.36 : 103,485.72 = 45,020.59 : x
  2. Step 2: Convert to fraction form
    69,018.36/103,485.72 = 45,020.59/x
  3. Step 3: Cross multiply
    69,018.36x = 103,485.72 × 45,020.59
  4. Step 4: Simplify right side
    69,018.36x = 4,658,988,170.97
  5. Step 5: Solve for x
    x = 4,658,988,170.97/69,018.36
  6. Step 6: Final answer
    x = 67,503.61

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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.