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Finding the Fourth Proportional to 100,035.62, 138,043.50 and 54,704.60

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Solution

The fourth proportional to 100,035.62, 138,043.50 and 54,704.60 is: 75,489.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,035.62 : 138,043.50 = 54,704.60 : x
  2. Step 2: Convert to fraction form
    100,035.62/138,043.50 = 54,704.60/x
  3. Step 3: Cross multiply
    100,035.62x = 138,043.50 × 54,704.60
  4. Step 4: Simplify right side
    100,035.62x = 7,551,614,450.10
  5. Step 5: Solve for x
    x = 7,551,614,450.10/100,035.62
  6. Step 6: Final answer
    x = 75,489.26

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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.