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Finding the Fourth Proportional to 139,319.76, 192,263.67 and 75,657.56

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Solution

The fourth proportional to 139,319.76, 192,263.67 and 75,657.56 is: 104,408.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,319.76 : 192,263.67 = 75,657.56 : x
  2. Step 2: Convert to fraction form
    139,319.76/192,263.67 = 75,657.56/x
  3. Step 3: Cross multiply
    139,319.76x = 192,263.67 × 75,657.56
  4. Step 4: Simplify right side
    139,319.76x = 14,546,200,629.50
  5. Step 5: Solve for x
    x = 14,546,200,629.50/139,319.76
  6. Step 6: Final answer
    x = 104,408.74

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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.