Home / 81,396.09-112,391.55-54,198.72

Finding the Fourth Proportional to 81,396.09, 112,391.55 and 54,198.72

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Solution

The fourth proportional to 81,396.09, 112,391.55 and 54,198.72 is: 74,837.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,396.09 : 112,391.55 = 54,198.72 : x
  2. Step 2: Convert to fraction form
    81,396.09/112,391.55 = 54,198.72/x
  3. Step 3: Cross multiply
    81,396.09x = 112,391.55 × 54,198.72
  4. Step 4: Simplify right side
    81,396.09x = 6,091,478,148.82
  5. Step 5: Solve for x
    x = 6,091,478,148.82/81,396.09
  6. Step 6: Final answer
    x = 74,837.48

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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.