Home / 81,913.28-122,634.20-73,365.62

Finding the Fourth Proportional to 81,913.28, 122,634.20 and 73,365.62

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Solution

The fourth proportional to 81,913.28, 122,634.20 and 73,365.62 is: 109,837.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,913.28 : 122,634.20 = 73,365.62 : x
  2. Step 2: Convert to fraction form
    81,913.28/122,634.20 = 73,365.62/x
  3. Step 3: Cross multiply
    81,913.28x = 122,634.20 × 73,365.62
  4. Step 4: Simplify right side
    81,913.28x = 8,997,133,686.45
  5. Step 5: Solve for x
    x = 8,997,133,686.45/81,913.28
  6. Step 6: Final answer
    x = 109,837.31

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.