Home / 81,062.68-111,917.86-55,611.72

Finding the Fourth Proportional to 81,062.68, 111,917.86 and 55,611.72

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Solution

The fourth proportional to 81,062.68, 111,917.86 and 55,611.72 is: 76,779.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,062.68 : 111,917.86 = 55,611.72 : x
  2. Step 2: Convert to fraction form
    81,062.68/111,917.86 = 55,611.72/x
  3. Step 3: Cross multiply
    81,062.68x = 111,917.86 × 55,611.72
  4. Step 4: Simplify right side
    81,062.68x = 6,223,944,693.32
  5. Step 5: Solve for x
    x = 6,223,944,693.32/81,062.68
  6. Step 6: Final answer
    x = 76,779.41

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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.