Home / 100,520.39-138,712.70-55,204.34

Finding the Fourth Proportional to 100,520.39, 138,712.70 and 55,204.34

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Solution

The fourth proportional to 100,520.39, 138,712.70 and 55,204.34 is: 76,179.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,520.39 : 138,712.70 = 55,204.34 : x
  2. Step 2: Convert to fraction form
    100,520.39/138,712.70 = 55,204.34/x
  3. Step 3: Cross multiply
    100,520.39x = 138,712.70 × 55,204.34
  4. Step 4: Simplify right side
    100,520.39x = 7,657,542,497.57
  5. Step 5: Solve for x
    x = 7,657,542,497.57/100,520.39
  6. Step 6: Final answer
    x = 76,179.00

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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.