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Finding the Fourth Proportional to 69,019.08, 103,486.78 and 45,021.30

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Solution

The fourth proportional to 69,019.08, 103,486.78 and 45,021.30 is: 67,504.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,019.08 : 103,486.78 = 45,021.30 : x
  2. Step 2: Convert to fraction form
    69,019.08/103,486.78 = 45,021.30/x
  3. Step 3: Cross multiply
    69,019.08x = 103,486.78 × 45,021.30
  4. Step 4: Simplify right side
    69,019.08x = 4,659,109,368.41
  5. Step 5: Solve for x
    x = 4,659,109,368.41/69,019.08
  6. Step 6: Final answer
    x = 67,504.66

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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.