Home / 100,634.97-138,877.70-55,317.15

Finding the Fourth Proportional to 100,634.97, 138,877.70 and 55,317.15

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Solution

The fourth proportional to 100,634.97, 138,877.70 and 55,317.15 is: 76,338.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,634.97 : 138,877.70 = 55,317.15 : x
  2. Step 2: Convert to fraction form
    100,634.97/138,877.70 = 55,317.15/x
  3. Step 3: Cross multiply
    100,634.97x = 138,877.70 × 55,317.15
  4. Step 4: Simplify right side
    100,634.97x = 7,682,318,285.97
  5. Step 5: Solve for x
    x = 7,682,318,285.97/100,634.97
  6. Step 6: Final answer
    x = 76,338.45

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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.