Home / 100,079.17-138,109.16-54,757.34

Finding the Fourth Proportional to 100,079.17, 138,109.16 and 54,757.34

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Solution

The fourth proportional to 100,079.17, 138,109.16 and 54,757.34 is: 75,565.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,079.17 : 138,109.16 = 54,757.34 : x
  2. Step 2: Convert to fraction form
    100,079.17/138,109.16 = 54,757.34/x
  3. Step 3: Cross multiply
    100,079.17x = 138,109.16 × 54,757.34
  4. Step 4: Simplify right side
    100,079.17x = 7,562,489,786.95
  5. Step 5: Solve for x
    x = 7,562,489,786.95/100,079.17
  6. Step 6: Final answer
    x = 75,565.07

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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.