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Finding the Fourth Proportional to 69,140.70, 103,638.15 and 39,494.70

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Solution

The fourth proportional to 69,140.70, 103,638.15 and 39,494.70 is: 59,200.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,140.70 : 103,638.15 = 39,494.70 : x
  2. Step 2: Convert to fraction form
    69,140.70/103,638.15 = 39,494.70/x
  3. Step 3: Cross multiply
    69,140.70x = 103,638.15 × 39,494.70
  4. Step 4: Simplify right side
    69,140.70x = 4,093,157,642.81
  5. Step 5: Solve for x
    x = 4,093,157,642.81/69,140.70
  6. Step 6: Final answer
    x = 59,200.41

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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.