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Finding the Fourth Proportional to 117,389.05, 161,992.51 and 63,672.28

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Solution

The fourth proportional to 117,389.05, 161,992.51 and 63,672.28 is: 87,865.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,389.05 : 161,992.51 = 63,672.28 : x
  2. Step 2: Convert to fraction form
    117,389.05/161,992.51 = 63,672.28/x
  3. Step 3: Cross multiply
    117,389.05x = 161,992.51 × 63,672.28
  4. Step 4: Simplify right side
    117,389.05x = 10,314,431,890.46
  5. Step 5: Solve for x
    x = 10,314,431,890.46/117,389.05
  6. Step 6: Final answer
    x = 87,865.37

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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.