Home / 137,018.12-189,083.58-80,418.56

Finding the Fourth Proportional to 137,018.12, 189,083.58 and 80,418.56

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Solution

The fourth proportional to 137,018.12, 189,083.58 and 80,418.56 is: 110,976.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,018.12 : 189,083.58 = 80,418.56 : x
  2. Step 2: Convert to fraction form
    137,018.12/189,083.58 = 80,418.56/x
  3. Step 3: Cross multiply
    137,018.12x = 189,083.58 × 80,418.56
  4. Step 4: Simplify right side
    137,018.12x = 15,205,829,223.24
  5. Step 5: Solve for x
    x = 15,205,829,223.24/137,018.12
  6. Step 6: Final answer
    x = 110,976.78

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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.