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Finding the Fourth Proportional to 139,572.12, 192,566.06 and 79,138.02

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Solution

The fourth proportional to 139,572.12, 192,566.06 and 79,138.02 is: 109,185.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,572.12 : 192,566.06 = 79,138.02 : x
  2. Step 2: Convert to fraction form
    139,572.12/192,566.06 = 79,138.02/x
  3. Step 3: Cross multiply
    139,572.12x = 192,566.06 × 79,138.02
  4. Step 4: Simplify right side
    139,572.12x = 15,239,296,707.60
  5. Step 5: Solve for x
    x = 15,239,296,707.60/139,572.12
  6. Step 6: Final answer
    x = 109,185.82

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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.