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Finding the Fourth Proportional to 100,236.85, 138,326.97 and 54,296.59

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Solution

The fourth proportional to 100,236.85, 138,326.97 and 54,296.59 is: 74,929.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,236.85 : 138,326.97 = 54,296.59 : x
  2. Step 2: Convert to fraction form
    100,236.85/138,326.97 = 54,296.59/x
  3. Step 3: Cross multiply
    100,236.85x = 138,326.97 × 54,296.59
  4. Step 4: Simplify right side
    100,236.85x = 7,510,681,948.66
  5. Step 5: Solve for x
    x = 7,510,681,948.66/100,236.85
  6. Step 6: Final answer
    x = 74,929.35

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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.