Home / 100,161.19-138,221.98-54,220.86

Finding the Fourth Proportional to 100,161.19, 138,221.98 and 54,220.86

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Solution

The fourth proportional to 100,161.19, 138,221.98 and 54,220.86 is: 74,824.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,161.19 : 138,221.98 = 54,220.86 : x
  2. Step 2: Convert to fraction form
    100,161.19/138,221.98 = 54,220.86/x
  3. Step 3: Cross multiply
    100,161.19x = 138,221.98 × 54,220.86
  4. Step 4: Simplify right side
    100,161.19x = 7,494,514,490.95
  5. Step 5: Solve for x
    x = 7,494,514,490.95/100,161.19
  6. Step 6: Final answer
    x = 74,824.53

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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.