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Finding the Fourth Proportional to 100,796.40, 139,101.40 and 55,476.90

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Solution

The fourth proportional to 100,796.40, 139,101.40 and 55,476.90 is: 76,559.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,796.40 : 139,101.40 = 55,476.90 : x
  2. Step 2: Convert to fraction form
    100,796.40/139,101.40 = 55,476.90/x
  3. Step 3: Cross multiply
    100,796.40x = 139,101.40 × 55,476.90
  4. Step 4: Simplify right side
    100,796.40x = 7,716,914,527.01
  5. Step 5: Solve for x
    x = 7,716,914,527.01/100,796.40
  6. Step 6: Final answer
    x = 76,559.43

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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.