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Finding the Fourth Proportional to 117,149.70, 161,663.13 and 66,164.52

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Solution

The fourth proportional to 117,149.70, 161,663.13 and 66,164.52 is: 91,305.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,149.70 : 161,663.13 = 66,164.52 : x
  2. Step 2: Convert to fraction form
    117,149.70/161,663.13 = 66,164.52/x
  3. Step 3: Cross multiply
    117,149.70x = 161,663.13 × 66,164.52
  4. Step 4: Simplify right side
    117,149.70x = 10,696,363,398.15
  5. Step 5: Solve for x
    x = 10,696,363,398.15/117,149.70
  6. Step 6: Final answer
    x = 91,305.09

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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.