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Finding the Fourth Proportional to 139,477.64, 192,447.20 and 79,034.36

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Solution

The fourth proportional to 139,477.64, 192,447.20 and 79,034.36 is: 109,049.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,477.64 : 192,447.20 = 79,034.36 : x
  2. Step 2: Convert to fraction form
    139,477.64/192,447.20 = 79,034.36/x
  3. Step 3: Cross multiply
    139,477.64x = 192,447.20 × 79,034.36
  4. Step 4: Simplify right side
    139,477.64x = 15,209,941,285.79
  5. Step 5: Solve for x
    x = 15,209,941,285.79/139,477.64
  6. Step 6: Final answer
    x = 109,049.32

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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.