Home / 100,105.85-138,086.02-66,114.41

Finding the Fourth Proportional to 100,105.85, 138,086.02 and 66,114.41

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Solution

The fourth proportional to 100,105.85, 138,086.02 and 66,114.41 is: 91,198.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,105.85 : 138,086.02 = 66,114.41 : x
  2. Step 2: Convert to fraction form
    100,105.85/138,086.02 = 66,114.41/x
  3. Step 3: Cross multiply
    100,105.85x = 138,086.02 × 66,114.41
  4. Step 4: Simplify right side
    100,105.85x = 9,129,474,885.83
  5. Step 5: Solve for x
    x = 9,129,474,885.83/100,105.85
  6. Step 6: Final answer
    x = 91,198.21

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.