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Finding the Fourth Proportional to 78,946.88, 118,504.62 and 33,990.50

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Solution

The fourth proportional to 78,946.88, 118,504.62 and 33,990.50 is: 51,022.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,946.88 : 118,504.62 = 33,990.50 : x
  2. Step 2: Convert to fraction form
    78,946.88/118,504.62 = 33,990.50/x
  3. Step 3: Cross multiply
    78,946.88x = 118,504.62 × 33,990.50
  4. Step 4: Simplify right side
    78,946.88x = 4,028,031,286.11
  5. Step 5: Solve for x
    x = 4,028,031,286.11/78,946.88
  6. Step 6: Final answer
    x = 51,022.05

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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.