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Finding the Fourth Proportional to 118,019.80, 177,029.70 and 39,146.20

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Solution

The fourth proportional to 118,019.80, 177,029.70 and 39,146.20 is: 58,719.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,019.80 : 177,029.70 = 39,146.20 : x
  2. Step 2: Convert to fraction form
    118,019.80/177,029.70 = 39,146.20/x
  3. Step 3: Cross multiply
    118,019.80x = 177,029.70 × 39,146.20
  4. Step 4: Simplify right side
    118,019.80x = 6,930,040,042.14
  5. Step 5: Solve for x
    x = 6,930,040,042.14/118,019.80
  6. Step 6: Final answer
    x = 58,719.30

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1.5x scale

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.