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Finding the Fourth Proportional to 117,105.35, 161,605.40 and 63,390.80

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Solution

The fourth proportional to 117,105.35, 161,605.40 and 63,390.80 is: 87,479.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,105.35 : 161,605.40 = 63,390.80 : x
  2. Step 2: Convert to fraction form
    117,105.35/161,605.40 = 63,390.80/x
  3. Step 3: Cross multiply
    117,105.35x = 161,605.40 × 63,390.80
  4. Step 4: Simplify right side
    117,105.35x = 10,244,295,677.38
  5. Step 5: Solve for x
    x = 10,244,295,677.38/117,105.35
  6. Step 6: Final answer
    x = 87,479.32

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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.