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Finding the Fourth Proportional to 69,078.70, 103,618.05 and 67,542.70

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Solution

The fourth proportional to 69,078.70, 103,618.05 and 67,542.70 is: 101,314.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,078.70 : 103,618.05 = 67,542.70 : x
  2. Step 2: Convert to fraction form
    69,078.70/103,618.05 = 67,542.70/x
  3. Step 3: Cross multiply
    69,078.70x = 103,618.05 × 67,542.70
  4. Step 4: Simplify right side
    69,078.70x = 6,998,642,865.74
  5. Step 5: Solve for x
    x = 6,998,642,865.74/69,078.70
  6. Step 6: Final answer
    x = 101,314.05

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1.5x scale

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.