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Finding the Fourth Proportional to 117,205.80, 161,744.40 and 63,490.65

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Solution

The fourth proportional to 117,205.80, 161,744.40 and 63,490.65 is: 87,617.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,205.80 : 161,744.40 = 63,490.65 : x
  2. Step 2: Convert to fraction form
    117,205.80/161,744.40 = 63,490.65/x
  3. Step 3: Cross multiply
    117,205.80x = 161,744.40 × 63,490.65
  4. Step 4: Simplify right side
    117,205.80x = 10,269,257,089.86
  5. Step 5: Solve for x
    x = 10,269,257,089.86/117,205.80
  6. Step 6: Final answer
    x = 87,617.31

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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.