Home / 81,405.03-122,242.87-54,921.40

Finding the Fourth Proportional to 81,405.03, 122,242.87 and 54,921.40

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Solution

The fourth proportional to 81,405.03, 122,242.87 and 54,921.40 is: 82,473.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,405.03 : 122,242.87 = 54,921.40 : x
  2. Step 2: Convert to fraction form
    81,405.03/122,242.87 = 54,921.40/x
  3. Step 3: Cross multiply
    81,405.03x = 122,242.87 × 54,921.40
  4. Step 4: Simplify right side
    81,405.03x = 6,713,749,560.42
  5. Step 5: Solve for x
    x = 6,713,749,560.42/81,405.03
  6. Step 6: Final answer
    x = 82,473.40

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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.