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Finding the Fourth Proportional to 81,220.62, 112,086.79 and 45,410.72

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Solution

The fourth proportional to 81,220.62, 112,086.79 and 45,410.72 is: 62,668.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,220.62 : 112,086.79 = 45,410.72 : x
  2. Step 2: Convert to fraction form
    81,220.62/112,086.79 = 45,410.72/x
  3. Step 3: Cross multiply
    81,220.62x = 112,086.79 × 45,410.72
  4. Step 4: Simplify right side
    81,220.62x = 5,089,942,003.08
  5. Step 5: Solve for x
    x = 5,089,942,003.08/81,220.62
  6. Step 6: Final answer
    x = 62,668.10

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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.