Home / 138,318.12-190,477.26-120,160.56

Finding the Fourth Proportional to 138,318.12, 190,477.26 and 120,160.56

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Solution

The fourth proportional to 138,318.12, 190,477.26 and 120,160.56 is: 165,472.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,318.12 : 190,477.26 = 120,160.56 : x
  2. Step 2: Convert to fraction form
    138,318.12/190,477.26 = 120,160.56/x
  3. Step 3: Cross multiply
    138,318.12x = 190,477.26 × 120,160.56
  4. Step 4: Simplify right side
    138,318.12x = 22,887,854,228.87
  5. Step 5: Solve for x
    x = 22,887,854,228.87/138,318.12
  6. Step 6: Final answer
    x = 165,472.57

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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.