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Finding the Fourth Proportional to 139,666.63, 192,743.40 and 76,007.92

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Solution

The fourth proportional to 139,666.63, 192,743.40 and 76,007.92 is: 104,892.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,666.63 : 192,743.40 = 76,007.92 : x
  2. Step 2: Convert to fraction form
    139,666.63/192,743.40 = 76,007.92/x
  3. Step 3: Cross multiply
    139,666.63x = 192,743.40 × 76,007.92
  4. Step 4: Simplify right side
    139,666.63x = 14,650,024,927.73
  5. Step 5: Solve for x
    x = 14,650,024,927.73/139,666.63
  6. Step 6: Final answer
    x = 104,892.81

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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.