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Finding the Fourth Proportional to 81,170.76, 112,086.90 and 51,008.34

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Solution

The fourth proportional to 81,170.76, 112,086.90 and 51,008.34 is: 70,436.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,170.76 : 112,086.90 = 51,008.34 : x
  2. Step 2: Convert to fraction form
    81,170.76/112,086.90 = 51,008.34/x
  3. Step 3: Cross multiply
    81,170.76x = 112,086.90 × 51,008.34
  4. Step 4: Simplify right side
    81,170.76x = 5,717,366,704.75
  5. Step 5: Solve for x
    x = 5,717,366,704.75/81,170.76
  6. Step 6: Final answer
    x = 70,436.28

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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.