Home / 85,515.96-128,286-26,356.44

Finding the Fourth Proportional to 85,515.96, 128,286 and 26,356.44

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Solution

The fourth proportional to 85,515.96, 128,286 and 26,356.44 is: 39,538.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,515.96 : 128,286 = 26,356.44 : x
  2. Step 2: Convert to fraction form
    85,515.96/128,286 = 26,356.44/x
  3. Step 3: Cross multiply
    85,515.96x = 128,286 × 26,356.44
  4. Step 4: Simplify right side
    85,515.96x = 3,381,162,261.84
  5. Step 5: Solve for x
    x = 3,381,162,261.84/85,515.96
  6. Step 6: Final answer
    x = 39,538.38

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.