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Finding the Fourth Proportional to 81,770.36, 112,844.12 and 49,504.56

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Solution

The fourth proportional to 81,770.36, 112,844.12 and 49,504.56 is: 68,316.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,770.36 : 112,844.12 = 49,504.56 : x
  2. Step 2: Convert to fraction form
    81,770.36/112,844.12 = 49,504.56/x
  3. Step 3: Cross multiply
    81,770.36x = 112,844.12 × 49,504.56
  4. Step 4: Simplify right side
    81,770.36x = 5,586,298,509.19
  5. Step 5: Solve for x
    x = 5,586,298,509.19/81,770.36
  6. Step 6: Final answer
    x = 68,316.91

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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.