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Finding the Fourth Proportional to 69,078.40, 103,672.28 and 26,978.65

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Solution

The fourth proportional to 69,078.40, 103,672.28 and 26,978.65 is: 40,489.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,078.40 : 103,672.28 = 26,978.65 : x
  2. Step 2: Convert to fraction form
    69,078.40/103,672.28 = 26,978.65/x
  3. Step 3: Cross multiply
    69,078.40x = 103,672.28 × 26,978.65
  4. Step 4: Simplify right side
    69,078.40x = 2,796,938,156.82
  5. Step 5: Solve for x
    x = 2,796,938,156.82/69,078.40
  6. Step 6: Final answer
    x = 40,489.33

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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.