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Finding the Fourth Proportional to 77,179.17, 106,405.16 and 55,650.90

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Solution

The fourth proportional to 77,179.17, 106,405.16 and 55,650.90 is: 76,724.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,179.17 : 106,405.16 = 55,650.90 : x
  2. Step 2: Convert to fraction form
    77,179.17/106,405.16 = 55,650.90/x
  3. Step 3: Cross multiply
    77,179.17x = 106,405.16 × 55,650.90
  4. Step 4: Simplify right side
    77,179.17x = 5,921,542,640.39
  5. Step 5: Solve for x
    x = 5,921,542,640.39/77,179.17
  6. Step 6: Final answer
    x = 76,724.62

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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.