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Finding the Fourth Proportional to 139,686.78, 192,767.37 and 76,024.62

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Solution

The fourth proportional to 139,686.78, 192,767.37 and 76,024.62 is: 104,913.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,686.78 : 192,767.37 = 76,024.62 : x
  2. Step 2: Convert to fraction form
    139,686.78/192,767.37 = 76,024.62/x
  3. Step 3: Cross multiply
    139,686.78x = 192,767.37 × 76,024.62
  4. Step 4: Simplify right side
    139,686.78x = 14,655,066,052.65
  5. Step 5: Solve for x
    x = 14,655,066,052.65/139,686.78
  6. Step 6: Final answer
    x = 104,913.77

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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.