Home / 100,422.40-138,586.89-55,102.36

Finding the Fourth Proportional to 100,422.40, 138,586.89 and 55,102.36

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Solution

The fourth proportional to 100,422.40, 138,586.89 and 55,102.36 is: 76,043.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,422.40 : 138,586.89 = 55,102.36 : x
  2. Step 2: Convert to fraction form
    100,422.40/138,586.89 = 55,102.36/x
  3. Step 3: Cross multiply
    100,422.40x = 138,586.89 × 55,102.36
  4. Step 4: Simplify right side
    100,422.40x = 7,636,464,704.06
  5. Step 5: Solve for x
    x = 7,636,464,704.06/100,422.40
  6. Step 6: Final answer
    x = 76,043.44

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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.