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Finding the Fourth Proportional to 81,388.92, 122,118.46 and 43,941.55

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Solution

The fourth proportional to 81,388.92, 122,118.46 and 43,941.55 is: 65,931.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,388.92 : 122,118.46 = 43,941.55 : x
  2. Step 2: Convert to fraction form
    81,388.92/122,118.46 = 43,941.55/x
  3. Step 3: Cross multiply
    81,388.92x = 122,118.46 × 43,941.55
  4. Step 4: Simplify right side
    81,388.92x = 5,366,074,416.01
  5. Step 5: Solve for x
    x = 5,366,074,416.01/81,388.92
  6. Step 6: Final answer
    x = 65,931.26

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.