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Finding the Fourth Proportional to 117,212.34, 161,763.03 and 66,234.45

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Solution

The fourth proportional to 117,212.34, 161,763.03 and 66,234.45 is: 91,409.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,212.34 : 161,763.03 = 66,234.45 : x
  2. Step 2: Convert to fraction form
    117,212.34/161,763.03 = 66,234.45/x
  3. Step 3: Cross multiply
    117,212.34x = 161,763.03 × 66,234.45
  4. Step 4: Simplify right side
    117,212.34x = 10,714,285,322.38
  5. Step 5: Solve for x
    x = 10,714,285,322.38/117,212.34
  6. Step 6: Final answer
    x = 91,409.19

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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.