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Finding the Fourth Proportional to 100,441, 138,603.18 and 55,118.26

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Solution

The fourth proportional to 100,441, 138,603.18 and 55,118.26 is: 76,060.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,441 : 138,603.18 = 55,118.26 : x
  2. Step 2: Convert to fraction form
    100,441/138,603.18 = 55,118.26/x
  3. Step 3: Cross multiply
    100,441x = 138,603.18 × 55,118.26
  4. Step 4: Simplify right side
    100,441x = 7,639,566,112.07
  5. Step 5: Solve for x
    x = 7,639,566,112.07/100,441
  6. Step 6: Final answer
    x = 76,060.24

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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.