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Finding the Fourth Proportional to 139,438.93, 192,410.07 and 78,996.63

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Solution

The fourth proportional to 139,438.93, 192,410.07 and 78,996.63 is: 109,006.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,438.93 : 192,410.07 = 78,996.63 : x
  2. Step 2: Convert to fraction form
    139,438.93/192,410.07 = 78,996.63/x
  3. Step 3: Cross multiply
    139,438.93x = 192,410.07 × 78,996.63
  4. Step 4: Simplify right side
    139,438.93x = 15,199,747,108.06
  5. Step 5: Solve for x
    x = 15,199,747,108.06/139,438.93
  6. Step 6: Final answer
    x = 109,006.48

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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.