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Finding the Fourth Proportional to 139,719.64, 192,814.74 and 76,058.56

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Solution

The fourth proportional to 139,719.64, 192,814.74 and 76,058.56 is: 104,961.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,719.64 : 192,814.74 = 76,058.56 : x
  2. Step 2: Convert to fraction form
    139,719.64/192,814.74 = 76,058.56/x
  3. Step 3: Cross multiply
    139,719.64x = 192,814.74 × 76,058.56
  4. Step 4: Simplify right side
    139,719.64x = 14,665,211,471.17
  5. Step 5: Solve for x
    x = 14,665,211,471.17/139,719.64
  6. Step 6: Final answer
    x = 104,961.70

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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.