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Finding the Fourth Proportional to 71,993.81, 107,987.85 and 40,397.13

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Solution

The fourth proportional to 71,993.81, 107,987.85 and 40,397.13 is: 60,594.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,993.81 : 107,987.85 = 40,397.13 : x
  2. Step 2: Convert to fraction form
    71,993.81/107,987.85 = 40,397.13/x
  3. Step 3: Cross multiply
    71,993.81x = 107,987.85 × 40,397.13
  4. Step 4: Simplify right side
    71,993.81x = 4,362,399,214.87
  5. Step 5: Solve for x
    x = 4,362,399,214.87/71,993.81
  6. Step 6: Final answer
    x = 60,594.09

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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.