Home / 91,839.12-137,410.88-54,419.28

Finding the Fourth Proportional to 91,839.12, 137,410.88 and 54,419.28

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Solution

The fourth proportional to 91,839.12, 137,410.88 and 54,419.28 is: 81,422.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,839.12 : 137,410.88 = 54,419.28 : x
  2. Step 2: Convert to fraction form
    91,839.12/137,410.88 = 54,419.28/x
  3. Step 3: Cross multiply
    91,839.12x = 137,410.88 × 54,419.28
  4. Step 4: Simplify right side
    91,839.12x = 7,477,801,153.77
  5. Step 5: Solve for x
    x = 7,477,801,153.77/91,839.12
  6. Step 6: Final answer
    x = 81,422.83

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.