Home / 100,120.16-138,163.92-55,408.16

Finding the Fourth Proportional to 100,120.16, 138,163.92 and 55,408.16

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Solution

The fourth proportional to 100,120.16, 138,163.92 and 55,408.16 is: 76,462.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,120.16 : 138,163.92 = 55,408.16 : x
  2. Step 2: Convert to fraction form
    100,120.16/138,163.92 = 55,408.16/x
  3. Step 3: Cross multiply
    100,120.16x = 138,163.92 × 55,408.16
  4. Step 4: Simplify right side
    100,120.16x = 7,655,408,585.59
  5. Step 5: Solve for x
    x = 7,655,408,585.59/100,120.16
  6. Step 6: Final answer
    x = 76,462.21

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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.