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Finding the Fourth Proportional to 139,797.52, 192,936 and 86,071.84

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Solution

The fourth proportional to 139,797.52, 192,936 and 86,071.84 is: 118,788.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,797.52 : 192,936 = 86,071.84 : x
  2. Step 2: Convert to fraction form
    139,797.52/192,936 = 86,071.84/x
  3. Step 3: Cross multiply
    139,797.52x = 192,936 × 86,071.84
  4. Step 4: Simplify right side
    139,797.52x = 16,606,356,522.24
  5. Step 5: Solve for x
    x = 16,606,356,522.24/139,797.52
  6. Step 6: Final answer
    x = 118,788.63

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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.