Home / 81,984.40-122,976.60-71,616.40

Finding the Fourth Proportional to 81,984.40, 122,976.60 and 71,616.40

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Solution

The fourth proportional to 81,984.40, 122,976.60 and 71,616.40 is: 107,424.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,984.40 : 122,976.60 = 71,616.40 : x
  2. Step 2: Convert to fraction form
    81,984.40/122,976.60 = 71,616.40/x
  3. Step 3: Cross multiply
    81,984.40x = 122,976.60 × 71,616.40
  4. Step 4: Simplify right side
    81,984.40x = 8,807,141,376.24
  5. Step 5: Solve for x
    x = 8,807,141,376.24/81,984.40
  6. Step 6: Final answer
    x = 107,424.60

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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.