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Finding the Fourth Proportional to 48,759.80, 73,139.70 and 40,886.60

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Solution

The fourth proportional to 48,759.80, 73,139.70 and 40,886.60 is: 61,329.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    48,759.80 : 73,139.70 = 40,886.60 : x
  2. Step 2: Convert to fraction form
    48,759.80/73,139.70 = 40,886.60/x
  3. Step 3: Cross multiply
    48,759.80x = 73,139.70 × 40,886.60
  4. Step 4: Simplify right side
    48,759.80x = 2,990,433,658.02
  5. Step 5: Solve for x
    x = 2,990,433,658.02/48,759.80
  6. Step 6: Final answer
    x = 61,329.90

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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.