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Finding the Fourth Proportional to 136,933.60, 205,400.40 and 131,490.40

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Solution

The fourth proportional to 136,933.60, 205,400.40 and 131,490.40 is: 197,235.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,933.60 : 205,400.40 = 131,490.40 : x
  2. Step 2: Convert to fraction form
    136,933.60/205,400.40 = 131,490.40/x
  3. Step 3: Cross multiply
    136,933.60x = 205,400.40 × 131,490.40
  4. Step 4: Simplify right side
    136,933.60x = 27,008,180,756.16
  5. Step 5: Solve for x
    x = 27,008,180,756.16/136,933.60
  6. Step 6: Final answer
    x = 197,235.60

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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.