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Finding the Fourth Proportional to 117,376.51, 161,979.66 and 63,661.51

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Solution

The fourth proportional to 117,376.51, 161,979.66 and 63,661.51 is: 87,852.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,376.51 : 161,979.66 = 63,661.51 : x
  2. Step 2: Convert to fraction form
    117,376.51/161,979.66 = 63,661.51/x
  3. Step 3: Cross multiply
    117,376.51x = 161,979.66 × 63,661.51
  4. Step 4: Simplify right side
    117,376.51x = 10,311,869,744.89
  5. Step 5: Solve for x
    x = 10,311,869,744.89/117,376.51
  6. Step 6: Final answer
    x = 87,852.93

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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.