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Finding the Fourth Proportional to 136,992.18, 205,406.12 and 56,933.58

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Solution

The fourth proportional to 136,992.18, 205,406.12 and 56,933.58 is: 85,366.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,992.18 : 205,406.12 = 56,933.58 : x
  2. Step 2: Convert to fraction form
    136,992.18/205,406.12 = 56,933.58/x
  3. Step 3: Cross multiply
    136,992.18x = 205,406.12 × 56,933.58
  4. Step 4: Simplify right side
    136,992.18x = 11,694,505,765.51
  5. Step 5: Solve for x
    x = 11,694,505,765.51/136,992.18
  6. Step 6: Final answer
    x = 85,366.23

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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.