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Finding the Fourth Proportional to 135,967.78, 203,980.47 and 42,480.58

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Solution

The fourth proportional to 135,967.78, 203,980.47 and 42,480.58 is: 63,729.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,967.78 : 203,980.47 = 42,480.58 : x
  2. Step 2: Convert to fraction form
    135,967.78/203,980.47 = 42,480.58/x
  3. Step 3: Cross multiply
    135,967.78x = 203,980.47 × 42,480.58
  4. Step 4: Simplify right side
    135,967.78x = 8,665,208,674.27
  5. Step 5: Solve for x
    x = 8,665,208,674.27/135,967.78
  6. Step 6: Final answer
    x = 63,729.87

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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.