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Finding the Fourth Proportional to 139,617.78, 192,666.87 and 75,955.83

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Solution

The fourth proportional to 139,617.78, 192,666.87 and 75,955.83 is: 104,815.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,617.78 : 192,666.87 = 75,955.83 : x
  2. Step 2: Convert to fraction form
    139,617.78/192,666.87 = 75,955.83/x
  3. Step 3: Cross multiply
    139,617.78x = 192,666.87 × 75,955.83
  4. Step 4: Simplify right side
    139,617.78x = 14,634,172,024.35
  5. Step 5: Solve for x
    x = 14,634,172,024.35/139,617.78
  6. Step 6: Final answer
    x = 104,815.96

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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.