Home / 81,981.10-122,971.67-63,288.42

Finding the Fourth Proportional to 81,981.10, 122,971.67 and 63,288.42

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Solution

The fourth proportional to 81,981.10, 122,971.67 and 63,288.42 is: 94,932.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,981.10 : 122,971.67 = 63,288.42 : x
  2. Step 2: Convert to fraction form
    81,981.10/122,971.67 = 63,288.42/x
  3. Step 3: Cross multiply
    81,981.10x = 122,971.67 × 63,288.42
  4. Step 4: Simplify right side
    81,981.10x = 7,782,682,699.06
  5. Step 5: Solve for x
    x = 7,782,682,699.06/81,981.10
  6. Step 6: Final answer
    x = 94,932.65

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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.