Home / 81,533.91-112,498.83-78,845.95

Finding the Fourth Proportional to 81,533.91, 112,498.83 and 78,845.95

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Solution

The fourth proportional to 81,533.91, 112,498.83 and 78,845.95 is: 108,790.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,533.91 : 112,498.83 = 78,845.95 : x
  2. Step 2: Convert to fraction form
    81,533.91/112,498.83 = 78,845.95/x
  3. Step 3: Cross multiply
    81,533.91x = 112,498.83 × 78,845.95
  4. Step 4: Simplify right side
    81,533.91x = 8,870,077,125.24
  5. Step 5: Solve for x
    x = 8,870,077,125.24/81,533.91
  6. Step 6: Final answer
    x = 108,790.04

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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.