Home / 81,429.15-122,143.73-67,605.15

Finding the Fourth Proportional to 81,429.15, 122,143.73 and 67,605.15

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Solution

The fourth proportional to 81,429.15, 122,143.73 and 67,605.15 is: 101,407.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,429.15 : 122,143.73 = 67,605.15 : x
  2. Step 2: Convert to fraction form
    81,429.15/122,143.73 = 67,605.15/x
  3. Step 3: Cross multiply
    81,429.15x = 122,143.73 × 67,605.15
  4. Step 4: Simplify right side
    81,429.15x = 8,257,544,850.18
  5. Step 5: Solve for x
    x = 8,257,544,850.18/81,429.15
  6. Step 6: Final answer
    x = 101,407.73

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1.5x scale

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.