Home / 81,721.20-112,755.44-47,710.32

Finding the Fourth Proportional to 81,721.20, 112,755.44 and 47,710.32

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Solution

The fourth proportional to 81,721.20, 112,755.44 and 47,710.32 is: 65,828.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,721.20 : 112,755.44 = 47,710.32 : x
  2. Step 2: Convert to fraction form
    81,721.20/112,755.44 = 47,710.32/x
  3. Step 3: Cross multiply
    81,721.20x = 112,755.44 × 47,710.32
  4. Step 4: Simplify right side
    81,721.20x = 5,379,597,820.58
  5. Step 5: Solve for x
    x = 5,379,597,820.58/81,721.20
  6. Step 6: Final answer
    x = 65,828.67

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.