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Finding the Fourth Proportional to 117,105.12, 161,605.16 and 63,389.97

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Solution

The fourth proportional to 117,105.12, 161,605.16 and 63,389.97 is: 87,478.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,105.12 : 161,605.16 = 63,389.97 : x
  2. Step 2: Convert to fraction form
    117,105.12/161,605.16 = 63,389.97/x
  3. Step 3: Cross multiply
    117,105.12x = 161,605.16 × 63,389.97
  4. Step 4: Simplify right side
    117,105.12x = 10,244,146,244.25
  5. Step 5: Solve for x
    x = 10,244,146,244.25/117,105.12
  6. Step 6: Final answer
    x = 87,478.21

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1.5x scale

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.