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Finding the Fourth Proportional to 139,674.72, 192,976.62 and 97,421.88

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Solution

The fourth proportional to 139,674.72, 192,976.62 and 97,421.88 is: 134,599.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,674.72 : 192,976.62 = 97,421.88 : x
  2. Step 2: Convert to fraction form
    139,674.72/192,976.62 = 97,421.88/x
  3. Step 3: Cross multiply
    139,674.72x = 192,976.62 × 97,421.88
  4. Step 4: Simplify right side
    139,674.72x = 18,800,145,116.45
  5. Step 5: Solve for x
    x = 18,800,145,116.45/139,674.72
  6. Step 6: Final answer
    x = 134,599.48

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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.