Home / 81,739.29-112,813.59-68,105.70

Finding the Fourth Proportional to 81,739.29, 112,813.59 and 68,105.70

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Solution

The fourth proportional to 81,739.29, 112,813.59 and 68,105.70 is: 93,997.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,739.29 : 112,813.59 = 68,105.70 : x
  2. Step 2: Convert to fraction form
    81,739.29/112,813.59 = 68,105.70/x
  3. Step 3: Cross multiply
    81,739.29x = 112,813.59 × 68,105.70
  4. Step 4: Simplify right side
    81,739.29x = 7,683,248,516.46
  5. Step 5: Solve for x
    x = 7,683,248,516.46/81,739.29
  6. Step 6: Final answer
    x = 93,997.01

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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.