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Finding the Fourth Proportional to 139,489.83, 192,449.12 and 79,055.73

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Solution

The fourth proportional to 139,489.83, 192,449.12 and 79,055.73 is: 109,070.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,489.83 : 192,449.12 = 79,055.73 : x
  2. Step 2: Convert to fraction form
    139,489.83/192,449.12 = 79,055.73/x
  3. Step 3: Cross multiply
    139,489.83x = 192,449.12 × 79,055.73
  4. Step 4: Simplify right side
    139,489.83x = 15,214,205,274.18
  5. Step 5: Solve for x
    x = 15,214,205,274.18/139,489.83
  6. Step 6: Final answer
    x = 109,070.35

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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.