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Finding the Fourth Proportional to 118,694.45, 178,041.66 and 39,808.44

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Solution

The fourth proportional to 118,694.45, 178,041.66 and 39,808.44 is: 59,712.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,694.45 : 178,041.66 = 39,808.44 : x
  2. Step 2: Convert to fraction form
    118,694.45/178,041.66 = 39,808.44/x
  3. Step 3: Cross multiply
    118,694.45x = 178,041.66 × 39,808.44
  4. Step 4: Simplify right side
    118,694.45x = 7,087,560,739.61
  5. Step 5: Solve for x
    x = 7,087,560,739.61/118,694.45
  6. Step 6: Final answer
    x = 59,712.66

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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.