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Finding the Fourth Proportional to 116,787, 161,166.24 and 66,486

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Solution

The fourth proportional to 116,787, 161,166.24 and 66,486 is: 91,750.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    116,787 : 161,166.24 = 66,486 : x
  2. Step 2: Convert to fraction form
    116,787/161,166.24 = 66,486/x
  3. Step 3: Cross multiply
    116,787x = 161,166.24 × 66,486
  4. Step 4: Simplify right side
    116,787x = 10,715,298,632.64
  5. Step 5: Solve for x
    x = 10,715,298,632.64/116,787
  6. Step 6: Final answer
    x = 91,750.78

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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.