Home / 81,948-113,081.35-50,110.75

Finding the Fourth Proportional to 81,948, 113,081.35 and 50,110.75

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Solution

The fourth proportional to 81,948, 113,081.35 and 50,110.75 is: 69,148.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,948 : 113,081.35 = 50,110.75 : x
  2. Step 2: Convert to fraction form
    81,948/113,081.35 = 50,110.75/x
  3. Step 3: Cross multiply
    81,948x = 113,081.35 × 50,110.75
  4. Step 4: Simplify right side
    81,948x = 5,666,590,443.55
  5. Step 5: Solve for x
    x = 5,666,590,443.55/81,948
  6. Step 6: Final answer
    x = 69,148.61

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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.