Home / 80,742.78-111,551.44-61,689.25

Finding the Fourth Proportional to 80,742.78, 111,551.44 and 61,689.25

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Solution

The fourth proportional to 80,742.78, 111,551.44 and 61,689.25 is: 85,227.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,742.78 : 111,551.44 = 61,689.25 : x
  2. Step 2: Convert to fraction form
    80,742.78/111,551.44 = 61,689.25/x
  3. Step 3: Cross multiply
    80,742.78x = 111,551.44 × 61,689.25
  4. Step 4: Simplify right side
    80,742.78x = 6,881,524,670.02
  5. Step 5: Solve for x
    x = 6,881,524,670.02/80,742.78
  6. Step 6: Final answer
    x = 85,227.74

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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.