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Finding the Fourth Proportional to 387,912.81, 581,891.08 and 118,049.73

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Solution

The fourth proportional to 387,912.81, 581,891.08 and 118,049.73 is: 177,081.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,912.81 : 581,891.08 = 118,049.73 : x
  2. Step 2: Convert to fraction form
    387,912.81/581,891.08 = 118,049.73/x
  3. Step 3: Cross multiply
    387,912.81x = 581,891.08 × 118,049.73
  4. Step 4: Simplify right side
    387,912.81x = 68,692,084,883.41
  5. Step 5: Solve for x
    x = 68,692,084,883.41/387,912.81
  6. Step 6: Final answer
    x = 177,081.25

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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.