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Finding the Fourth Proportional to 117,149.31, 161,665.81 and 63,434.48

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Solution

The fourth proportional to 117,149.31, 161,665.81 and 63,434.48 is: 87,539.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,149.31 : 161,665.81 = 63,434.48 : x
  2. Step 2: Convert to fraction form
    117,149.31/161,665.81 = 63,434.48/x
  3. Step 3: Cross multiply
    117,149.31x = 161,665.81 × 63,434.48
  4. Step 4: Simplify right side
    117,149.31x = 10,255,185,624.21
  5. Step 5: Solve for x
    x = 10,255,185,624.21/117,149.31
  6. Step 6: Final answer
    x = 87,539.45

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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.