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Finding the Fourth Proportional to 81,297.62, 112,203.98 and 55,782.92

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Solution

The fourth proportional to 81,297.62, 112,203.98 and 55,782.92 is: 76,989.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,297.62 : 112,203.98 = 55,782.92 : x
  2. Step 2: Convert to fraction form
    81,297.62/112,203.98 = 55,782.92/x
  3. Step 3: Cross multiply
    81,297.62x = 112,203.98 × 55,782.92
  4. Step 4: Simplify right side
    81,297.62x = 6,259,065,639.22
  5. Step 5: Solve for x
    x = 6,259,065,639.22/81,297.62
  6. Step 6: Final answer
    x = 76,989.54

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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.