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Finding the Fourth Proportional to 117,280, 161,845.49 and 63,563.64

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Solution

The fourth proportional to 117,280, 161,845.49 and 63,563.64 is: 87,717.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,280 : 161,845.49 = 63,563.64 : x
  2. Step 2: Convert to fraction form
    117,280/161,845.49 = 63,563.64/x
  3. Step 3: Cross multiply
    117,280x = 161,845.49 × 63,563.64
  4. Step 4: Simplify right side
    117,280x = 10,287,488,461.98
  5. Step 5: Solve for x
    x = 10,287,488,461.98/117,280
  6. Step 6: Final answer
    x = 87,717.33

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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.