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Finding the Fourth Proportional to 49,793.40, 74,690.10 and 45,991.80

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Solution

The fourth proportional to 49,793.40, 74,690.10 and 45,991.80 is: 68,987.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    49,793.40 : 74,690.10 = 45,991.80 : x
  2. Step 2: Convert to fraction form
    49,793.40/74,690.10 = 45,991.80/x
  3. Step 3: Cross multiply
    49,793.40x = 74,690.10 × 45,991.80
  4. Step 4: Simplify right side
    49,793.40x = 3,435,132,141.18
  5. Step 5: Solve for x
    x = 3,435,132,141.18/49,793.40
  6. Step 6: Final answer
    x = 68,987.70

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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.