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Finding the Fourth Proportional to 100,279.44, 138,387.36 and 54,954.40

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Solution

The fourth proportional to 100,279.44, 138,387.36 and 54,954.40 is: 75,838.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,279.44 : 138,387.36 = 54,954.40 : x
  2. Step 2: Convert to fraction form
    100,279.44/138,387.36 = 54,954.40/x
  3. Step 3: Cross multiply
    100,279.44x = 138,387.36 × 54,954.40
  4. Step 4: Simplify right side
    100,279.44x = 7,604,994,336.38
  5. Step 5: Solve for x
    x = 7,604,994,336.38/100,279.44
  6. Step 6: Final answer
    x = 75,838.02

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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.