Home / 81,971.28-122,956.52-25,816.16

Finding the Fourth Proportional to 81,971.28, 122,956.52 and 25,816.16

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Solution

The fourth proportional to 81,971.28, 122,956.52 and 25,816.16 is: 38,724.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,971.28 : 122,956.52 = 25,816.16 : x
  2. Step 2: Convert to fraction form
    81,971.28/122,956.52 = 25,816.16/x
  3. Step 3: Cross multiply
    81,971.28x = 122,956.52 × 25,816.16
  4. Step 4: Simplify right side
    81,971.28x = 3,174,265,193.36
  5. Step 5: Solve for x
    x = 3,174,265,193.36/81,971.28
  6. Step 6: Final answer
    x = 38,724.11

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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.