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Finding the Fourth Proportional to 117,158, 161,677.80 and 63,443

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Solution

The fourth proportional to 117,158, 161,677.80 and 63,443 is: 87,551.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,158 : 161,677.80 = 63,443 : x
  2. Step 2: Convert to fraction form
    117,158/161,677.80 = 63,443/x
  3. Step 3: Cross multiply
    117,158x = 161,677.80 × 63,443
  4. Step 4: Simplify right side
    117,158x = 10,257,324,665.40
  5. Step 5: Solve for x
    x = 10,257,324,665.40/117,158
  6. Step 6: Final answer
    x = 87,551.21

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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.