Home / 81,462.12-122,163.20-28,140.53

Finding the Fourth Proportional to 81,462.12, 122,163.20 and 28,140.53

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Solution

The fourth proportional to 81,462.12, 122,163.20 and 28,140.53 is: 42,200.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,462.12 : 122,163.20 = 28,140.53 : x
  2. Step 2: Convert to fraction form
    81,462.12/122,163.20 = 28,140.53/x
  3. Step 3: Cross multiply
    81,462.12x = 122,163.20 × 28,140.53
  4. Step 4: Simplify right side
    81,462.12x = 3,437,736,548.50
  5. Step 5: Solve for x
    x = 3,437,736,548.50/81,462.12
  6. Step 6: Final answer
    x = 42,200.43

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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.