Home / 122,639.67-169,022.30-90,753.21

Finding the Fourth Proportional to 122,639.67, 169,022.30 and 90,753.21

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Solution

The fourth proportional to 122,639.67, 169,022.30 and 90,753.21 is: 125,076.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,639.67 : 169,022.30 = 90,753.21 : x
  2. Step 2: Convert to fraction form
    122,639.67/169,022.30 = 90,753.21/x
  3. Step 3: Cross multiply
    122,639.67x = 169,022.30 × 90,753.21
  4. Step 4: Simplify right side
    122,639.67x = 15,339,315,832.82
  5. Step 5: Solve for x
    x = 15,339,315,832.82/122,639.67
  6. Step 6: Final answer
    x = 125,076.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.