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Finding the Fourth Proportional to 139,418.55, 192,398.81 and 75,756.34

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Solution

The fourth proportional to 139,418.55, 192,398.81 and 75,756.34 is: 104,544.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,418.55 : 192,398.81 = 75,756.34 : x
  2. Step 2: Convert to fraction form
    139,418.55/192,398.81 = 75,756.34/x
  3. Step 3: Cross multiply
    139,418.55x = 192,398.81 × 75,756.34
  4. Step 4: Simplify right side
    139,418.55x = 14,575,430,336.34
  5. Step 5: Solve for x
    x = 14,575,430,336.34/139,418.55
  6. Step 6: Final answer
    x = 104,544.41

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1.5x scale

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.