Home / 55,872-77,103.36-30,723.12

Finding the Fourth Proportional to 55,872, 77,103.36 and 30,723.12

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Solution

The fourth proportional to 55,872, 77,103.36 and 30,723.12 is: 42,397.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,872 : 77,103.36 = 30,723.12 : x
  2. Step 2: Convert to fraction form
    55,872/77,103.36 = 30,723.12/x
  3. Step 3: Cross multiply
    55,872x = 77,103.36 × 30,723.12
  4. Step 4: Simplify right side
    55,872x = 2,368,855,781.68
  5. Step 5: Solve for x
    x = 2,368,855,781.68/55,872
  6. Step 6: Final answer
    x = 42,397.91

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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.