Home / 81,873.66-122,784.36-31,941.60

Finding the Fourth Proportional to 81,873.66, 122,784.36 and 31,941.60

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Solution

The fourth proportional to 81,873.66, 122,784.36 and 31,941.60 is: 47,902.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,873.66 : 122,784.36 = 31,941.60 : x
  2. Step 2: Convert to fraction form
    81,873.66/122,784.36 = 31,941.60/x
  3. Step 3: Cross multiply
    81,873.66x = 122,784.36 × 31,941.60
  4. Step 4: Simplify right side
    81,873.66x = 3,921,928,913.38
  5. Step 5: Solve for x
    x = 3,921,928,913.38/81,873.66
  6. Step 6: Final answer
    x = 47,902.21

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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.