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Finding the Fourth Proportional to 131,737.64, 181,902.74 and 121,662.39

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Solution

The fourth proportional to 131,737.64, 181,902.74 and 121,662.39 is: 167,990.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,737.64 : 181,902.74 = 121,662.39 : x
  2. Step 2: Convert to fraction form
    131,737.64/181,902.74 = 121,662.39/x
  3. Step 3: Cross multiply
    131,737.64x = 181,902.74 × 121,662.39
  4. Step 4: Simplify right side
    131,737.64x = 22,130,721,487.64
  5. Step 5: Solve for x
    x = 22,130,721,487.64/131,737.64
  6. Step 6: Final answer
    x = 167,990.88

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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.