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Finding the Fourth Proportional to 81,790.75, 112,827.49 and 54,887.01

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Solution

The fourth proportional to 81,790.75, 112,827.49 and 54,887.01 is: 75,714.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,790.75 : 112,827.49 = 54,887.01 : x
  2. Step 2: Convert to fraction form
    81,790.75/112,827.49 = 54,887.01/x
  3. Step 3: Cross multiply
    81,790.75x = 112,827.49 × 54,887.01
  4. Step 4: Simplify right side
    81,790.75x = 6,192,763,571.90
  5. Step 5: Solve for x
    x = 6,192,763,571.90/81,790.75
  6. Step 6: Final answer
    x = 75,714.72

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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.