Home / 81,803.08-122,647.38-31,841.20

Finding the Fourth Proportional to 81,803.08, 122,647.38 and 31,841.20

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Solution

The fourth proportional to 81,803.08, 122,647.38 and 31,841.20 is: 47,739.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,803.08 : 122,647.38 = 31,841.20 : x
  2. Step 2: Convert to fraction form
    81,803.08/122,647.38 = 31,841.20/x
  3. Step 3: Cross multiply
    81,803.08x = 122,647.38 × 31,841.20
  4. Step 4: Simplify right side
    81,803.08x = 3,905,239,756.06
  5. Step 5: Solve for x
    x = 3,905,239,756.06/81,803.08
  6. Step 6: Final answer
    x = 47,739.52

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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.