Home / 111,727.15-154,233.16-66,419.80

Finding the Fourth Proportional to 111,727.15, 154,233.16 and 66,419.80

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Solution

The fourth proportional to 111,727.15, 154,233.16 and 66,419.80 is: 91,688.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,727.15 : 154,233.16 = 66,419.80 : x
  2. Step 2: Convert to fraction form
    111,727.15/154,233.16 = 66,419.80/x
  3. Step 3: Cross multiply
    111,727.15x = 154,233.16 × 66,419.80
  4. Step 4: Simplify right side
    111,727.15x = 10,244,135,462.55
  5. Step 5: Solve for x
    x = 10,244,135,462.55/111,727.15
  6. Step 6: Final answer
    x = 91,688.87

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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.