Home / 91,234.45-125,962.78-81,657.75

Finding the Fourth Proportional to 91,234.45, 125,962.78 and 81,657.75

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Solution

The fourth proportional to 91,234.45, 125,962.78 and 81,657.75 is: 112,740.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,234.45 : 125,962.78 = 81,657.75 : x
  2. Step 2: Convert to fraction form
    91,234.45/125,962.78 = 81,657.75/x
  3. Step 3: Cross multiply
    91,234.45x = 125,962.78 × 81,657.75
  4. Step 4: Simplify right side
    91,234.45x = 10,285,837,198.55
  5. Step 5: Solve for x
    x = 10,285,837,198.55/91,234.45
  6. Step 6: Final answer
    x = 112,740.72

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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.