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Finding the Fourth Proportional to 81,168.80, 112,043.68 and 61,083.94

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Solution

The fourth proportional to 81,168.80, 112,043.68 and 61,083.94 is: 84,318.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,168.80 : 112,043.68 = 61,083.94 : x
  2. Step 2: Convert to fraction form
    81,168.80/112,043.68 = 61,083.94/x
  3. Step 3: Cross multiply
    81,168.80x = 112,043.68 × 61,083.94
  4. Step 4: Simplify right side
    81,168.80x = 6,844,069,096.15
  5. Step 5: Solve for x
    x = 6,844,069,096.15/81,168.80
  6. Step 6: Final answer
    x = 84,318.97

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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.