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Finding the Fourth Proportional to 74,019.80, 111,029.70 and 51,858.20

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Solution

The fourth proportional to 74,019.80, 111,029.70 and 51,858.20 is: 77,787.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,019.80 : 111,029.70 = 51,858.20 : x
  2. Step 2: Convert to fraction form
    74,019.80/111,029.70 = 51,858.20/x
  3. Step 3: Cross multiply
    74,019.80x = 111,029.70 × 51,858.20
  4. Step 4: Simplify right side
    74,019.80x = 5,757,800,388.54
  5. Step 5: Solve for x
    x = 5,757,800,388.54/74,019.80
  6. Step 6: Final answer
    x = 77,787.30

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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.