Home / 100,386.60-138,535.26-55,068.84

Finding the Fourth Proportional to 100,386.60, 138,535.26 and 55,068.84

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Solution

The fourth proportional to 100,386.60, 138,535.26 and 55,068.84 is: 75,995.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,386.60 : 138,535.26 = 55,068.84 : x
  2. Step 2: Convert to fraction form
    100,386.60/138,535.26 = 55,068.84/x
  3. Step 3: Cross multiply
    100,386.60x = 138,535.26 × 55,068.84
  4. Step 4: Simplify right side
    100,386.60x = 7,628,976,067.30
  5. Step 5: Solve for x
    x = 7,628,976,067.30/100,386.60
  6. Step 6: Final answer
    x = 75,995.96

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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.