Home / 81,981.21-122,971.84-63,288.54

Finding the Fourth Proportional to 81,981.21, 122,971.84 and 63,288.54

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Solution

The fourth proportional to 81,981.21, 122,971.84 and 63,288.54 is: 94,932.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,981.21 : 122,971.84 = 63,288.54 : x
  2. Step 2: Convert to fraction form
    81,981.21/122,971.84 = 63,288.54/x
  3. Step 3: Cross multiply
    81,981.21x = 122,971.84 × 63,288.54
  4. Step 4: Simplify right side
    81,981.21x = 7,782,708,056.49
  5. Step 5: Solve for x
    x = 7,782,708,056.49/81,981.21
  6. Step 6: Final answer
    x = 94,932.82

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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.