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Finding the Fourth Proportional to 81,894.70, 113,076.30 and 80,586.86

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Solution

The fourth proportional to 81,894.70, 113,076.30 and 80,586.86 is: 111,270.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,894.70 : 113,076.30 = 80,586.86 : x
  2. Step 2: Convert to fraction form
    81,894.70/113,076.30 = 80,586.86/x
  3. Step 3: Cross multiply
    81,894.70x = 113,076.30 × 80,586.86
  4. Step 4: Simplify right side
    81,894.70x = 9,112,463,957.42
  5. Step 5: Solve for x
    x = 9,112,463,957.42/81,894.70
  6. Step 6: Final answer
    x = 111,270.50

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1.5x scale

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.