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Finding the Fourth Proportional to 76,989.60, 106,245.72 and 44,730.48

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Solution

The fourth proportional to 76,989.60, 106,245.72 and 44,730.48 is: 61,728.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,989.60 : 106,245.72 = 44,730.48 : x
  2. Step 2: Convert to fraction form
    76,989.60/106,245.72 = 44,730.48/x
  3. Step 3: Cross multiply
    76,989.60x = 106,245.72 × 44,730.48
  4. Step 4: Simplify right side
    76,989.60x = 4,752,422,053.55
  5. Step 5: Solve for x
    x = 4,752,422,053.55/76,989.60
  6. Step 6: Final answer
    x = 61,728.10

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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.