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Finding the Fourth Proportional to 139,145.84, 192,021.62 and 75,483.63

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Solution

The fourth proportional to 139,145.84, 192,021.62 and 75,483.63 is: 104,167.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,145.84 : 192,021.62 = 75,483.63 : x
  2. Step 2: Convert to fraction form
    139,145.84/192,021.62 = 75,483.63/x
  3. Step 3: Cross multiply
    139,145.84x = 192,021.62 × 75,483.63
  4. Step 4: Simplify right side
    139,145.84x = 14,494,490,091.80
  5. Step 5: Solve for x
    x = 14,494,490,091.80/139,145.84
  6. Step 6: Final answer
    x = 104,167.62

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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.