Home / 100,370.13-138,512.34-55,052.25

Finding the Fourth Proportional to 100,370.13, 138,512.34 and 55,052.25

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Solution

The fourth proportional to 100,370.13, 138,512.34 and 55,052.25 is: 75,972.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,370.13 : 138,512.34 = 55,052.25 : x
  2. Step 2: Convert to fraction form
    100,370.13/138,512.34 = 55,052.25/x
  3. Step 3: Cross multiply
    100,370.13x = 138,512.34 × 55,052.25
  4. Step 4: Simplify right side
    100,370.13x = 7,625,415,969.77
  5. Step 5: Solve for x
    x = 7,625,415,969.77/100,370.13
  6. Step 6: Final answer
    x = 75,972.96

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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.