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Finding the Fourth Proportional to 135,889.74, 203,892.19 and 72,693.30

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Solution

The fourth proportional to 135,889.74, 203,892.19 and 72,693.30 is: 109,070.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,889.74 : 203,892.19 = 72,693.30 : x
  2. Step 2: Convert to fraction form
    135,889.74/203,892.19 = 72,693.30/x
  3. Step 3: Cross multiply
    135,889.74x = 203,892.19 × 72,693.30
  4. Step 4: Simplify right side
    135,889.74x = 14,821,596,135.33
  5. Step 5: Solve for x
    x = 14,821,596,135.33/135,889.74
  6. Step 6: Final answer
    x = 109,070.75

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.