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Finding the Fourth Proportional to 77,812.67, 107,380.32 and 43,821.25

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Solution

The fourth proportional to 77,812.67, 107,380.32 and 43,821.25 is: 60,472.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,812.67 : 107,380.32 = 43,821.25 : x
  2. Step 2: Convert to fraction form
    77,812.67/107,380.32 = 43,821.25/x
  3. Step 3: Cross multiply
    77,812.67x = 107,380.32 × 43,821.25
  4. Step 4: Simplify right side
    77,812.67x = 4,705,539,310.90
  5. Step 5: Solve for x
    x = 4,705,539,310.90/77,812.67
  6. Step 6: Final answer
    x = 60,472.66

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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.