Home / 100,120.44-138,216.12-57,670.80

Finding the Fourth Proportional to 100,120.44, 138,216.12 and 57,670.80

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Solution

The fourth proportional to 100,120.44, 138,216.12 and 57,670.80 is: 79,614.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,120.44 : 138,216.12 = 57,670.80 : x
  2. Step 2: Convert to fraction form
    100,120.44/138,216.12 = 57,670.80/x
  3. Step 3: Cross multiply
    100,120.44x = 138,216.12 × 57,670.80
  4. Step 4: Simplify right side
    100,120.44x = 7,971,034,213.30
  5. Step 5: Solve for x
    x = 7,971,034,213.30/100,120.44
  6. Step 6: Final answer
    x = 79,614.45

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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.