Home / 100,656.14-138,905.08-55,336.97

Finding the Fourth Proportional to 100,656.14, 138,905.08 and 55,336.97

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Solution

The fourth proportional to 100,656.14, 138,905.08 and 55,336.97 is: 76,364.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,656.14 : 138,905.08 = 55,336.97 : x
  2. Step 2: Convert to fraction form
    100,656.14/138,905.08 = 55,336.97/x
  3. Step 3: Cross multiply
    100,656.14x = 138,905.08 × 55,336.97
  4. Step 4: Simplify right side
    100,656.14x = 7,686,586,453.73
  5. Step 5: Solve for x
    x = 7,686,586,453.73/100,656.14
  6. Step 6: Final answer
    x = 76,364.81

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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.