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Finding the Fourth Proportional to 117,140.63, 161,647.67 and 68,736.04

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Solution

The fourth proportional to 117,140.63, 161,647.67 and 68,736.04 is: 94,851.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,140.63 : 161,647.67 = 68,736.04 : x
  2. Step 2: Convert to fraction form
    117,140.63/161,647.67 = 68,736.04/x
  3. Step 3: Cross multiply
    117,140.63x = 161,647.67 × 68,736.04
  4. Step 4: Simplify right side
    117,140.63x = 11,111,019,902.79
  5. Step 5: Solve for x
    x = 11,111,019,902.79/117,140.63
  6. Step 6: Final answer
    x = 94,851.98

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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.