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Finding the Fourth Proportional to 117,316.53, 161,894.70 and 66,328.38

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Solution

The fourth proportional to 117,316.53, 161,894.70 and 66,328.38 is: 91,531.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,316.53 : 161,894.70 = 66,328.38 : x
  2. Step 2: Convert to fraction form
    117,316.53/161,894.70 = 66,328.38/x
  3. Step 3: Cross multiply
    117,316.53x = 161,894.70 × 66,328.38
  4. Step 4: Simplify right side
    117,316.53x = 10,738,213,181.59
  5. Step 5: Solve for x
    x = 10,738,213,181.59/117,316.53
  6. Step 6: Final answer
    x = 91,531.97

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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.