Home / 81,629.92-122,330-64,915.68

Finding the Fourth Proportional to 81,629.92, 122,330 and 64,915.68

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Solution

The fourth proportional to 81,629.92, 122,330 and 64,915.68 is: 97,282.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,629.92 : 122,330 = 64,915.68 : x
  2. Step 2: Convert to fraction form
    81,629.92/122,330 = 64,915.68/x
  3. Step 3: Cross multiply
    81,629.92x = 122,330 × 64,915.68
  4. Step 4: Simplify right side
    81,629.92x = 7,941,135,134.40
  5. Step 5: Solve for x
    x = 7,941,135,134.40/81,629.92
  6. Step 6: Final answer
    x = 97,282.16

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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.