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Finding the Fourth Proportional to 73,019.30, 100,766.74 and 39,485.30

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Solution

The fourth proportional to 73,019.30, 100,766.74 and 39,485.30 is: 54,489.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,019.30 : 100,766.74 = 39,485.30 : x
  2. Step 2: Convert to fraction form
    73,019.30/100,766.74 = 39,485.30/x
  3. Step 3: Cross multiply
    73,019.30x = 100,766.74 × 39,485.30
  4. Step 4: Simplify right side
    73,019.30x = 3,978,804,958.92
  5. Step 5: Solve for x
    x = 3,978,804,958.92/73,019.30
  6. Step 6: Final answer
    x = 54,489.77

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.