Home / 91,257.25-125,865.57-78,531.85

Finding the Fourth Proportional to 91,257.25, 125,865.57 and 78,531.85

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Solution

The fourth proportional to 91,257.25, 125,865.57 and 78,531.85 is: 108,314.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,257.25 : 125,865.57 = 78,531.85 : x
  2. Step 2: Convert to fraction form
    91,257.25/125,865.57 = 78,531.85/x
  3. Step 3: Cross multiply
    91,257.25x = 125,865.57 × 78,531.85
  4. Step 4: Simplify right side
    91,257.25x = 9,884,455,586.37
  5. Step 5: Solve for x
    x = 9,884,455,586.37/91,257.25
  6. Step 6: Final answer
    x = 108,314.20

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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.