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Finding the Fourth Proportional to 137,136.82, 189,172.66 and 79,769.68

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Solution

The fourth proportional to 137,136.82, 189,172.66 and 79,769.68 is: 110,037.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,136.82 : 189,172.66 = 79,769.68 : x
  2. Step 2: Convert to fraction form
    137,136.82/189,172.66 = 79,769.68/x
  3. Step 3: Cross multiply
    137,136.82x = 189,172.66 × 79,769.68
  4. Step 4: Simplify right side
    137,136.82x = 15,090,242,552.95
  5. Step 5: Solve for x
    x = 15,090,242,552.95/137,136.82
  6. Step 6: Final answer
    x = 110,037.86

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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.