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Finding the Fourth Proportional to 139,224.15, 192,128.36 and 75,560.31

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Solution

The fourth proportional to 139,224.15, 192,128.36 and 75,560.31 is: 104,272.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,224.15 : 192,128.36 = 75,560.31 : x
  2. Step 2: Convert to fraction form
    139,224.15/192,128.36 = 75,560.31/x
  3. Step 3: Cross multiply
    139,224.15x = 192,128.36 × 75,560.31
  4. Step 4: Simplify right side
    139,224.15x = 14,517,278,063.59
  5. Step 5: Solve for x
    x = 14,517,278,063.59/139,224.15
  6. Step 6: Final answer
    x = 104,272.70

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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.