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Finding the Fourth Proportional to 138,015.66, 205,999.60 and 118,958.70

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Solution

The fourth proportional to 138,015.66, 205,999.60 and 118,958.70 is: 177,555.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,015.66 : 205,999.60 = 118,958.70 : x
  2. Step 2: Convert to fraction form
    138,015.66/205,999.60 = 118,958.70/x
  3. Step 3: Cross multiply
    138,015.66x = 205,999.60 × 118,958.70
  4. Step 4: Simplify right side
    138,015.66x = 24,505,444,616.52
  5. Step 5: Solve for x
    x = 24,505,444,616.52/138,015.66
  6. Step 6: Final answer
    x = 177,555.54

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.