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Finding the Fourth Proportional to 136,168.26, 187,906.14 and 78,798.39

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Solution

The fourth proportional to 136,168.26, 187,906.14 and 78,798.39 is: 108,738.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,168.26 : 187,906.14 = 78,798.39 : x
  2. Step 2: Convert to fraction form
    136,168.26/187,906.14 = 78,798.39/x
  3. Step 3: Cross multiply
    136,168.26x = 187,906.14 × 78,798.39
  4. Step 4: Simplify right side
    136,168.26x = 14,806,701,303.11
  5. Step 5: Solve for x
    x = 14,806,701,303.11/136,168.26
  6. Step 6: Final answer
    x = 108,738.27

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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.