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Finding the Fourth Proportional to 76,660.95, 105,791.95 and 43,126.95

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Solution

The fourth proportional to 76,660.95, 105,791.95 and 43,126.95 is: 59,515.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,660.95 : 105,791.95 = 43,126.95 : x
  2. Step 2: Convert to fraction form
    76,660.95/105,791.95 = 43,126.95/x
  3. Step 3: Cross multiply
    76,660.95x = 105,791.95 × 43,126.95
  4. Step 4: Simplify right side
    76,660.95x = 4,562,484,138.05
  5. Step 5: Solve for x
    x = 4,562,484,138.05/76,660.95
  6. Step 6: Final answer
    x = 59,515.10

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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.