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Finding the Fourth Proportional to 136,906.60, 205,359.90 and 74,698.60

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Solution

The fourth proportional to 136,906.60, 205,359.90 and 74,698.60 is: 112,047.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,906.60 : 205,359.90 = 74,698.60 : x
  2. Step 2: Convert to fraction form
    136,906.60/205,359.90 = 74,698.60/x
  3. Step 3: Cross multiply
    136,906.60x = 205,359.90 × 74,698.60
  4. Step 4: Simplify right side
    136,906.60x = 15,340,097,026.14
  5. Step 5: Solve for x
    x = 15,340,097,026.14/136,906.60
  6. Step 6: Final answer
    x = 112,047.90

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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.