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Finding the Fourth Proportional to 81,874.80, 112,935.60 and 51,634.80

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Solution

The fourth proportional to 81,874.80, 112,935.60 and 51,634.80 is: 71,223.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,874.80 : 112,935.60 = 51,634.80 : x
  2. Step 2: Convert to fraction form
    81,874.80/112,935.60 = 51,634.80/x
  3. Step 3: Cross multiply
    81,874.80x = 112,935.60 × 51,634.80
  4. Step 4: Simplify right side
    81,874.80x = 5,831,407,118.88
  5. Step 5: Solve for x
    x = 5,831,407,118.88/81,874.80
  6. Step 6: Final answer
    x = 71,223.47

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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.