Home / 100,320.32-138,438.36-54,997.30

Finding the Fourth Proportional to 100,320.32, 138,438.36 and 54,997.30

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Solution

The fourth proportional to 100,320.32, 138,438.36 and 54,997.30 is: 75,894.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,320.32 : 138,438.36 = 54,997.30 : x
  2. Step 2: Convert to fraction form
    100,320.32/138,438.36 = 54,997.30/x
  3. Step 3: Cross multiply
    100,320.32x = 138,438.36 × 54,997.30
  4. Step 4: Simplify right side
    100,320.32x = 7,613,736,016.43
  5. Step 5: Solve for x
    x = 7,613,736,016.43/100,320.32
  6. Step 6: Final answer
    x = 75,894.26

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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.