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Finding the Fourth Proportional to 76,662.45, 105,794.02 and 43,128.45

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Solution

The fourth proportional to 76,662.45, 105,794.02 and 43,128.45 is: 59,517.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,662.45 : 105,794.02 = 43,128.45 : x
  2. Step 2: Convert to fraction form
    76,662.45/105,794.02 = 43,128.45/x
  3. Step 3: Cross multiply
    76,662.45x = 105,794.02 × 43,128.45
  4. Step 4: Simplify right side
    76,662.45x = 4,562,732,101.87
  5. Step 5: Solve for x
    x = 4,562,732,101.87/76,662.45
  6. Step 6: Final answer
    x = 59,517.17

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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.