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Finding the Fourth Proportional to 139,369.49, 192,388.74 and 94,108.76

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Solution

The fourth proportional to 139,369.49, 192,388.74 and 94,108.76 is: 129,909.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,369.49 : 192,388.74 = 94,108.76 : x
  2. Step 2: Convert to fraction form
    139,369.49/192,388.74 = 94,108.76/x
  3. Step 3: Cross multiply
    139,369.49x = 192,388.74 × 94,108.76
  4. Step 4: Simplify right side
    139,369.49x = 18,105,465,759.36
  5. Step 5: Solve for x
    x = 18,105,465,759.36/139,369.49
  6. Step 6: Final answer
    x = 129,909.82

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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.