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Finding the Fourth Proportional to 100,063.89, 138,086.64 and 54,740.75

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Solution

The fourth proportional to 100,063.89, 138,086.64 and 54,740.75 is: 75,541.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,063.89 : 138,086.64 = 54,740.75 : x
  2. Step 2: Convert to fraction form
    100,063.89/138,086.64 = 54,740.75/x
  3. Step 3: Cross multiply
    100,063.89x = 138,086.64 × 54,740.75
  4. Step 4: Simplify right side
    100,063.89x = 7,558,965,548.15
  5. Step 5: Solve for x
    x = 7,558,965,548.15/100,063.89
  6. Step 6: Final answer
    x = 75,541.39

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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.