Home / 81,656.08-122,452.52-31,729.60

Finding the Fourth Proportional to 81,656.08, 122,452.52 and 31,729.60

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Solution

The fourth proportional to 81,656.08, 122,452.52 and 31,729.60 is: 47,582.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,656.08 : 122,452.52 = 31,729.60 : x
  2. Step 2: Convert to fraction form
    81,656.08/122,452.52 = 31,729.60/x
  3. Step 3: Cross multiply
    81,656.08x = 122,452.52 × 31,729.60
  4. Step 4: Simplify right side
    81,656.08x = 3,885,369,478.59
  5. Step 5: Solve for x
    x = 3,885,369,478.59/81,656.08
  6. Step 6: Final answer
    x = 47,582.12

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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.