Home / 100,854.12-139,178.70-55,532.28

Finding the Fourth Proportional to 100,854.12, 139,178.70 and 55,532.28

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Solution

The fourth proportional to 100,854.12, 139,178.70 and 55,532.28 is: 76,634.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,854.12 : 139,178.70 = 55,532.28 : x
  2. Step 2: Convert to fraction form
    100,854.12/139,178.70 = 55,532.28/x
  3. Step 3: Cross multiply
    100,854.12x = 139,178.70 × 55,532.28
  4. Step 4: Simplify right side
    100,854.12x = 7,728,910,538.44
  5. Step 5: Solve for x
    x = 7,728,910,538.44/100,854.12
  6. Step 6: Final answer
    x = 76,634.55

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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.