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Finding the Fourth Proportional to 71,240.10, 106,866.29 and 18,649.56

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Solution

The fourth proportional to 71,240.10, 106,866.29 and 18,649.56 is: 27,975.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,240.10 : 106,866.29 = 18,649.56 : x
  2. Step 2: Convert to fraction form
    71,240.10/106,866.29 = 18,649.56/x
  3. Step 3: Cross multiply
    71,240.10x = 106,866.29 × 18,649.56
  4. Step 4: Simplify right side
    71,240.10x = 1,993,009,287.33
  5. Step 5: Solve for x
    x = 1,993,009,287.33/71,240.10
  6. Step 6: Final answer
    x = 27,975.95

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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.