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Finding the Fourth Proportional to 76,990.60, 106,247.10 and 44,731.48

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Solution

The fourth proportional to 76,990.60, 106,247.10 and 44,731.48 is: 61,729.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,990.60 : 106,247.10 = 44,731.48 : x
  2. Step 2: Convert to fraction form
    76,990.60/106,247.10 = 44,731.48/x
  3. Step 3: Cross multiply
    76,990.60x = 106,247.10 × 44,731.48
  4. Step 4: Simplify right side
    76,990.60x = 4,752,590,028.71
  5. Step 5: Solve for x
    x = 4,752,590,028.71/76,990.60
  6. Step 6: Final answer
    x = 61,729.48

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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.