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Finding the Fourth Proportional to 81,781.40, 122,607.30 and 44,845.40

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Solution

The fourth proportional to 81,781.40, 122,607.30 and 44,845.40 is: 67,232.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,781.40 : 122,607.30 = 44,845.40 : x
  2. Step 2: Convert to fraction form
    81,781.40/122,607.30 = 44,845.40/x
  3. Step 3: Cross multiply
    81,781.40x = 122,607.30 × 44,845.40
  4. Step 4: Simplify right side
    81,781.40x = 5,498,373,411.42
  5. Step 5: Solve for x
    x = 5,498,373,411.42/81,781.40
  6. Step 6: Final answer
    x = 67,232.57

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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.