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Finding the Fourth Proportional to 139,790.65, 192,904.24 and 79,353.21

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Solution

The fourth proportional to 139,790.65, 192,904.24 and 79,353.21 is: 109,503.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,790.65 : 192,904.24 = 79,353.21 : x
  2. Step 2: Convert to fraction form
    139,790.65/192,904.24 = 79,353.21/x
  3. Step 3: Cross multiply
    139,790.65x = 192,904.24 × 79,353.21
  4. Step 4: Simplify right side
    139,790.65x = 15,307,570,269.84
  5. Step 5: Solve for x
    x = 15,307,570,269.84/139,790.65
  6. Step 6: Final answer
    x = 109,503.54

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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.