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Finding the Fourth Proportional to 49,489.80, 74,133.90 and 30,712.20

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Solution

The fourth proportional to 49,489.80, 74,133.90 and 30,712.20 is: 46,005.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    49,489.80 : 74,133.90 = 30,712.20 : x
  2. Step 2: Convert to fraction form
    49,489.80/74,133.90 = 30,712.20/x
  3. Step 3: Cross multiply
    49,489.80x = 74,133.90 × 30,712.20
  4. Step 4: Simplify right side
    49,489.80x = 2,276,815,163.58
  5. Step 5: Solve for x
    x = 2,276,815,163.58/49,489.80
  6. Step 6: Final answer
    x = 46,005.75

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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.