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Finding the Fourth Proportional to 69,002.70, 103,431.15 and 39,356.70

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Solution

The fourth proportional to 69,002.70, 103,431.15 and 39,356.70 is: 58,993.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,002.70 : 103,431.15 = 39,356.70 : x
  2. Step 2: Convert to fraction form
    69,002.70/103,431.15 = 39,356.70/x
  3. Step 3: Cross multiply
    69,002.70x = 103,431.15 × 39,356.70
  4. Step 4: Simplify right side
    69,002.70x = 4,070,708,741.21
  5. Step 5: Solve for x
    x = 4,070,708,741.21/69,002.70
  6. Step 6: Final answer
    x = 58,993.47

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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.