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Finding the Fourth Proportional to 69,813.76, 103,930.97 and 69,398.56

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Solution

The fourth proportional to 69,813.76, 103,930.97 and 69,398.56 is: 103,312.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,813.76 : 103,930.97 = 69,398.56 : x
  2. Step 2: Convert to fraction form
    69,813.76/103,930.97 = 69,398.56/x
  3. Step 3: Cross multiply
    69,813.76x = 103,930.97 × 69,398.56
  4. Step 4: Simplify right side
    69,813.76x = 7,212,659,657.40
  5. Step 5: Solve for x
    x = 7,212,659,657.40/69,813.76
  6. Step 6: Final answer
    x = 103,312.87

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.