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Finding the Fourth Proportional to 121,596.76, 167,721.60 and 105,653.80

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Solution

The fourth proportional to 121,596.76, 167,721.60 and 105,653.80 is: 145,731.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,596.76 : 167,721.60 = 105,653.80 : x
  2. Step 2: Convert to fraction form
    121,596.76/167,721.60 = 105,653.80/x
  3. Step 3: Cross multiply
    121,596.76x = 167,721.60 × 105,653.80
  4. Step 4: Simplify right side
    121,596.76x = 17,720,424,382.08
  5. Step 5: Solve for x
    x = 17,720,424,382.08/121,596.76
  6. Step 6: Final answer
    x = 145,731.06

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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.