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Finding the Fourth Proportional to 139,653.63, 192,720.38 and 75,990.33

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Solution

The fourth proportional to 139,653.63, 192,720.38 and 75,990.33 is: 104,865.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,653.63 : 192,720.38 = 75,990.33 : x
  2. Step 2: Convert to fraction form
    139,653.63/192,720.38 = 75,990.33/x
  3. Step 3: Cross multiply
    139,653.63x = 192,720.38 × 75,990.33
  4. Step 4: Simplify right side
    139,653.63x = 14,644,884,500.30
  5. Step 5: Solve for x
    x = 14,644,884,500.30/139,653.63
  6. Step 6: Final answer
    x = 104,865.77

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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.