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Finding the Fourth Proportional to 172,612.51, 238,136.83 and 105,583.39

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Solution

The fourth proportional to 172,612.51, 238,136.83 and 105,583.39 is: 145,663.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,612.51 : 238,136.83 = 105,583.39 : x
  2. Step 2: Convert to fraction form
    172,612.51/238,136.83 = 105,583.39/x
  3. Step 3: Cross multiply
    172,612.51x = 238,136.83 × 105,583.39
  4. Step 4: Simplify right side
    172,612.51x = 25,143,293,795.25
  5. Step 5: Solve for x
    x = 25,143,293,795.25/172,612.51
  6. Step 6: Final answer
    x = 145,663.22

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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.