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Finding the Fourth Proportional to 139,662.76, 192,738.66 and 76,004.66

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Solution

The fourth proportional to 139,662.76, 192,738.66 and 76,004.66 is: 104,888.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,662.76 : 192,738.66 = 76,004.66 : x
  2. Step 2: Convert to fraction form
    139,662.76/192,738.66 = 76,004.66/x
  3. Step 3: Cross multiply
    139,662.76x = 192,738.66 × 76,004.66
  4. Step 4: Simplify right side
    139,662.76x = 14,649,036,322.16
  5. Step 5: Solve for x
    x = 14,649,036,322.16/139,662.76
  6. Step 6: Final answer
    x = 104,888.64

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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.