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Finding the Fourth Proportional to 98,912.60, 136,424.94 and 68,697.98

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Solution

The fourth proportional to 98,912.60, 136,424.94 and 68,697.98 is: 94,751.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,912.60 : 136,424.94 = 68,697.98 : x
  2. Step 2: Convert to fraction form
    98,912.60/136,424.94 = 68,697.98/x
  3. Step 3: Cross multiply
    98,912.60x = 136,424.94 × 68,697.98
  4. Step 4: Simplify right side
    98,912.60x = 9,372,117,799.62
  5. Step 5: Solve for x
    x = 9,372,117,799.62/98,912.60
  6. Step 6: Final answer
    x = 94,751.51

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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.