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Finding the Fourth Proportional to 135,897.82, 203,753.71 and 69,208.90

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Solution

The fourth proportional to 135,897.82, 203,753.71 and 69,208.90 is: 103,765.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,897.82 : 203,753.71 = 69,208.90 : x
  2. Step 2: Convert to fraction form
    135,897.82/203,753.71 = 69,208.90/x
  3. Step 3: Cross multiply
    135,897.82x = 203,753.71 × 69,208.90
  4. Step 4: Simplify right side
    135,897.82x = 14,101,570,140.02
  5. Step 5: Solve for x
    x = 14,101,570,140.02/135,897.82
  6. Step 6: Final answer
    x = 103,765.98

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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.