Home / 100,320.88-138,442.08-54,997.60

Finding the Fourth Proportional to 100,320.88, 138,442.08 and 54,997.60

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Solution

The fourth proportional to 100,320.88, 138,442.08 and 54,997.60 is: 75,896.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,320.88 : 138,442.08 = 54,997.60 : x
  2. Step 2: Convert to fraction form
    100,320.88/138,442.08 = 54,997.60/x
  3. Step 3: Cross multiply
    100,320.88x = 138,442.08 × 54,997.60
  4. Step 4: Simplify right side
    100,320.88x = 7,613,982,139.01
  5. Step 5: Solve for x
    x = 7,613,982,139.01/100,320.88
  6. Step 6: Final answer
    x = 75,896.29

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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.