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Finding the Fourth Proportional to 84,880.36, 126,697.49 and 78,625

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Solution

The fourth proportional to 84,880.36, 126,697.49 and 78,625 is: 117,360.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,880.36 : 126,697.49 = 78,625 : x
  2. Step 2: Convert to fraction form
    84,880.36/126,697.49 = 78,625/x
  3. Step 3: Cross multiply
    84,880.36x = 126,697.49 × 78,625
  4. Step 4: Simplify right side
    84,880.36x = 9,961,590,151.25
  5. Step 5: Solve for x
    x = 9,961,590,151.25/84,880.36
  6. Step 6: Final answer
    x = 117,360.37

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.