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Finding the Fourth Proportional to 78,940.97, 108,940.10 and 43,133.20

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Solution

The fourth proportional to 78,940.97, 108,940.10 and 43,133.20 is: 59,524.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,940.97 : 108,940.10 = 43,133.20 : x
  2. Step 2: Convert to fraction form
    78,940.97/108,940.10 = 43,133.20/x
  3. Step 3: Cross multiply
    78,940.97x = 108,940.10 × 43,133.20
  4. Step 4: Simplify right side
    78,940.97x = 4,698,935,121.32
  5. Step 5: Solve for x
    x = 4,698,935,121.32/78,940.97
  6. Step 6: Final answer
    x = 59,524.67

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.