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Finding the Fourth Proportional to 116,811.67, 161,212.73 and 71,520.11

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Solution

The fourth proportional to 116,811.67, 161,212.73 and 71,520.11 is: 98,705.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    116,811.67 : 161,212.73 = 71,520.11 : x
  2. Step 2: Convert to fraction form
    116,811.67/161,212.73 = 71,520.11/x
  3. Step 3: Cross multiply
    116,811.67x = 161,212.73 × 71,520.11
  4. Step 4: Simplify right side
    116,811.67x = 11,529,952,228.43
  5. Step 5: Solve for x
    x = 11,529,952,228.43/116,811.67
  6. Step 6: Final answer
    x = 98,705.48

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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.