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Finding the Fourth Proportional to 139,797.20, 192,925.60 and 79,373.47

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Solution

The fourth proportional to 139,797.20, 192,925.60 and 79,373.47 is: 109,538.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,797.20 : 192,925.60 = 79,373.47 : x
  2. Step 2: Convert to fraction form
    139,797.20/192,925.60 = 79,373.47/x
  3. Step 3: Cross multiply
    139,797.20x = 192,925.60 × 79,373.47
  4. Step 4: Simplify right side
    139,797.20x = 15,313,173,359.20
  5. Step 5: Solve for x
    x = 15,313,173,359.20/139,797.20
  6. Step 6: Final answer
    x = 109,538.48

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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.