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Finding the Fourth Proportional to 100,250.40, 138,344.04 and 54,928.20

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Solution

The fourth proportional to 100,250.40, 138,344.04 and 54,928.20 is: 75,800.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,250.40 : 138,344.04 = 54,928.20 : x
  2. Step 2: Convert to fraction form
    100,250.40/138,344.04 = 54,928.20/x
  3. Step 3: Cross multiply
    100,250.40x = 138,344.04 × 54,928.20
  4. Step 4: Simplify right side
    100,250.40x = 7,598,989,097.93
  5. Step 5: Solve for x
    x = 7,598,989,097.93/100,250.40
  6. Step 6: Final answer
    x = 75,800.09

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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.