Home / 81,665.28-122,977.58-71,259.41

Finding the Fourth Proportional to 81,665.28, 122,977.58 and 71,259.41

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Solution

The fourth proportional to 81,665.28, 122,977.58 and 71,259.41 is: 107,307.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,665.28 : 122,977.58 = 71,259.41 : x
  2. Step 2: Convert to fraction form
    81,665.28/122,977.58 = 71,259.41/x
  3. Step 3: Cross multiply
    81,665.28x = 122,977.58 × 71,259.41
  4. Step 4: Simplify right side
    81,665.28x = 8,763,309,745.17
  5. Step 5: Solve for x
    x = 8,763,309,745.17/81,665.28
  6. Step 6: Final answer
    x = 107,307.66

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.