Home / 100,105.30-138,139.36-54,774.24

Finding the Fourth Proportional to 100,105.30, 138,139.36 and 54,774.24

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Solution

The fourth proportional to 100,105.30, 138,139.36 and 54,774.24 is: 75,585.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,105.30 : 138,139.36 = 54,774.24 : x
  2. Step 2: Convert to fraction form
    100,105.30/138,139.36 = 54,774.24/x
  3. Step 3: Cross multiply
    100,105.30x = 138,139.36 × 54,774.24
  4. Step 4: Simplify right side
    100,105.30x = 7,566,478,458.09
  5. Step 5: Solve for x
    x = 7,566,478,458.09/100,105.30
  6. Step 6: Final answer
    x = 75,585.19

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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.