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Finding the Fourth Proportional to 139,647.75, 192,712.28 and 75,984.45

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Solution

The fourth proportional to 139,647.75, 192,712.28 and 75,984.45 is: 104,857.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,647.75 : 192,712.28 = 75,984.45 : x
  2. Step 2: Convert to fraction form
    139,647.75/192,712.28 = 75,984.45/x
  3. Step 3: Cross multiply
    139,647.75x = 192,712.28 × 75,984.45
  4. Step 4: Simplify right side
    139,647.75x = 14,643,136,224.12
  5. Step 5: Solve for x
    x = 14,643,136,224.12/139,647.75
  6. Step 6: Final answer
    x = 104,857.66

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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.