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Finding the Fourth Proportional to 139,259.70, 192,202.93 and 78,833.78

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Solution

The fourth proportional to 139,259.70, 192,202.93 and 78,833.78 is: 108,804.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,259.70 : 192,202.93 = 78,833.78 : x
  2. Step 2: Convert to fraction form
    139,259.70/192,202.93 = 78,833.78/x
  3. Step 3: Cross multiply
    139,259.70x = 192,202.93 × 78,833.78
  4. Step 4: Simplify right side
    139,259.70x = 15,152,083,498.98
  5. Step 5: Solve for x
    x = 15,152,083,498.98/139,259.70
  6. Step 6: Final answer
    x = 108,804.51

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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.