Home / 71,921.48-99,249.57-40,089.69

Finding the Fourth Proportional to 71,921.48, 99,249.57 and 40,089.69

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Solution

The fourth proportional to 71,921.48, 99,249.57 and 40,089.69 is: 55,322.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,921.48 : 99,249.57 = 40,089.69 : x
  2. Step 2: Convert to fraction form
    71,921.48/99,249.57 = 40,089.69/x
  3. Step 3: Cross multiply
    71,921.48x = 99,249.57 × 40,089.69
  4. Step 4: Simplify right side
    71,921.48x = 3,978,884,493.93
  5. Step 5: Solve for x
    x = 3,978,884,493.93/71,921.48
  6. Step 6: Final answer
    x = 55,322.62

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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.