Home / 81,724.40-122,557.80-29,135.60

Finding the Fourth Proportional to 81,724.40, 122,557.80 and 29,135.60

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Solution

The fourth proportional to 81,724.40, 122,557.80 and 29,135.60 is: 43,693.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,724.40 : 122,557.80 = 29,135.60 : x
  2. Step 2: Convert to fraction form
    81,724.40/122,557.80 = 29,135.60/x
  3. Step 3: Cross multiply
    81,724.40x = 122,557.80 × 29,135.60
  4. Step 4: Simplify right side
    81,724.40x = 3,570,795,037.68
  5. Step 5: Solve for x
    x = 3,570,795,037.68/81,724.40
  6. Step 6: Final answer
    x = 43,693.13

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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.