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Finding the Fourth Proportional to 117,368.78, 161,989.62 and 69,648.44

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Solution

The fourth proportional to 117,368.78, 161,989.62 and 69,648.44 is: 96,127.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,368.78 : 161,989.62 = 69,648.44 : x
  2. Step 2: Convert to fraction form
    117,368.78/161,989.62 = 69,648.44/x
  3. Step 3: Cross multiply
    117,368.78x = 161,989.62 × 69,648.44
  4. Step 4: Simplify right side
    117,368.78x = 11,282,324,329.19
  5. Step 5: Solve for x
    x = 11,282,324,329.19/117,368.78
  6. Step 6: Final answer
    x = 96,127.13

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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.