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Finding the Fourth Proportional to 81,737.52, 112,808.20 and 49,899.60

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Solution

The fourth proportional to 81,737.52, 112,808.20 and 49,899.60 is: 68,867.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,737.52 : 112,808.20 = 49,899.60 : x
  2. Step 2: Convert to fraction form
    81,737.52/112,808.20 = 49,899.60/x
  3. Step 3: Cross multiply
    81,737.52x = 112,808.20 × 49,899.60
  4. Step 4: Simplify right side
    81,737.52x = 5,629,084,056.72
  5. Step 5: Solve for x
    x = 5,629,084,056.72/81,737.52
  6. Step 6: Final answer
    x = 68,867.81

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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.