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Finding the Fourth Proportional to 66,914.81, 100,340.42 and 38,843.47

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Solution

The fourth proportional to 66,914.81, 100,340.42 and 38,843.47 is: 58,246.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,914.81 : 100,340.42 = 38,843.47 : x
  2. Step 2: Convert to fraction form
    66,914.81/100,340.42 = 38,843.47/x
  3. Step 3: Cross multiply
    66,914.81x = 100,340.42 × 38,843.47
  4. Step 4: Simplify right side
    66,914.81x = 3,897,570,094.06
  5. Step 5: Solve for x
    x = 3,897,570,094.06/66,914.81
  6. Step 6: Final answer
    x = 58,246.75

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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.