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Finding the Fourth Proportional to 136,600.70, 204,901.05 and 91,985.90

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Solution

The fourth proportional to 136,600.70, 204,901.05 and 91,985.90 is: 137,978.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,600.70 : 204,901.05 = 91,985.90 : x
  2. Step 2: Convert to fraction form
    136,600.70/204,901.05 = 91,985.90/x
  3. Step 3: Cross multiply
    136,600.70x = 204,901.05 × 91,985.90
  4. Step 4: Simplify right side
    136,600.70x = 18,848,007,495.20
  5. Step 5: Solve for x
    x = 18,848,007,495.20/136,600.70
  6. Step 6: Final answer
    x = 137,978.85

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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.