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Finding the Fourth Proportional to 172,908.68, 238,693.66 and 121,962.92

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Solution

The fourth proportional to 172,908.68, 238,693.66 and 121,962.92 is: 168,365.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,908.68 : 238,693.66 = 121,962.92 : x
  2. Step 2: Convert to fraction form
    172,908.68/238,693.66 = 121,962.92/x
  3. Step 3: Cross multiply
    172,908.68x = 238,693.66 × 121,962.92
  4. Step 4: Simplify right side
    172,908.68x = 29,111,775,759.09
  5. Step 5: Solve for x
    x = 29,111,775,759.09/172,908.68
  6. Step 6: Final answer
    x = 168,365.03

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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.