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Finding the Fourth Proportional to 136,293.68, 188,136.60 and 79,723.28

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Solution

The fourth proportional to 136,293.68, 188,136.60 and 79,723.28 is: 110,048.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,293.68 : 188,136.60 = 79,723.28 : x
  2. Step 2: Convert to fraction form
    136,293.68/188,136.60 = 79,723.28/x
  3. Step 3: Cross multiply
    136,293.68x = 188,136.60 × 79,723.28
  4. Step 4: Simplify right side
    136,293.68x = 14,998,866,840.05
  5. Step 5: Solve for x
    x = 14,998,866,840.05/136,293.68
  6. Step 6: Final answer
    x = 110,048.15

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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.