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Finding the Fourth Proportional to 117,379.51, 161,983.80 and 63,664.51

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Solution

The fourth proportional to 117,379.51, 161,983.80 and 63,664.51 is: 87,857.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,379.51 : 161,983.80 = 63,664.51 : x
  2. Step 2: Convert to fraction form
    117,379.51/161,983.80 = 63,664.51/x
  3. Step 3: Cross multiply
    117,379.51x = 161,983.80 × 63,664.51
  4. Step 4: Simplify right side
    117,379.51x = 10,312,619,254.94
  5. Step 5: Solve for x
    x = 10,312,619,254.94/117,379.51
  6. Step 6: Final answer
    x = 87,857.07

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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.