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Finding the Fourth Proportional to 67,345.40, 100,974.90 and 27,918.20

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Solution

The fourth proportional to 67,345.40, 100,974.90 and 27,918.20 is: 41,859.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,345.40 : 100,974.90 = 27,918.20 : x
  2. Step 2: Convert to fraction form
    67,345.40/100,974.90 = 27,918.20/x
  3. Step 3: Cross multiply
    67,345.40x = 100,974.90 × 27,918.20
  4. Step 4: Simplify right side
    67,345.40x = 2,819,037,453.18
  5. Step 5: Solve for x
    x = 2,819,037,453.18/67,345.40
  6. Step 6: Final answer
    x = 41,859.39

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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.