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Finding the Fourth Proportional to 136,706.15, 188,631.86 and 91,311.32

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Solution

The fourth proportional to 136,706.15, 188,631.86 and 91,311.32 is: 125,994.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,706.15 : 188,631.86 = 91,311.32 : x
  2. Step 2: Convert to fraction form
    136,706.15/188,631.86 = 91,311.32/x
  3. Step 3: Cross multiply
    136,706.15x = 188,631.86 × 91,311.32
  4. Step 4: Simplify right side
    136,706.15x = 17,224,224,145.68
  5. Step 5: Solve for x
    x = 17,224,224,145.68/136,706.15
  6. Step 6: Final answer
    x = 125,994.51

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.