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Finding the Fourth Proportional to 207,194.40, 310,713.48 and 66,915.36

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Solution

The fourth proportional to 207,194.40, 310,713.48 and 66,915.36 is: 100,347.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,194.40 : 310,713.48 = 66,915.36 : x
  2. Step 2: Convert to fraction form
    207,194.40/310,713.48 = 66,915.36/x
  3. Step 3: Cross multiply
    207,194.40x = 310,713.48 × 66,915.36
  4. Step 4: Simplify right side
    207,194.40x = 20,791,504,371.05
  5. Step 5: Solve for x
    x = 20,791,504,371.05/207,194.40
  6. Step 6: Final answer
    x = 100,347.81

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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.