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Finding the Fourth Proportional to 117,185.76, 161,715.96 and 63,470.64

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Solution

The fourth proportional to 117,185.76, 161,715.96 and 63,470.64 is: 87,589.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,185.76 : 161,715.96 = 63,470.64 : x
  2. Step 2: Convert to fraction form
    117,185.76/161,715.96 = 63,470.64/x
  3. Step 3: Cross multiply
    117,185.76x = 161,715.96 × 63,470.64
  4. Step 4: Simplify right side
    117,185.76x = 10,264,215,479.41
  5. Step 5: Solve for x
    x = 10,264,215,479.41/117,185.76
  6. Step 6: Final answer
    x = 87,589.27

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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.