Home / 100,162.13-138,223.26-54,221.81

Finding the Fourth Proportional to 100,162.13, 138,223.26 and 54,221.81

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Solution

The fourth proportional to 100,162.13, 138,223.26 and 54,221.81 is: 74,825.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,162.13 : 138,223.26 = 54,221.81 : x
  2. Step 2: Convert to fraction form
    100,162.13/138,223.26 = 54,221.81/x
  3. Step 3: Cross multiply
    100,162.13x = 138,223.26 × 54,221.81
  4. Step 4: Simplify right side
    100,162.13x = 7,494,714,650.18
  5. Step 5: Solve for x
    x = 7,494,714,650.18/100,162.13
  6. Step 6: Final answer
    x = 74,825.84

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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.