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Finding the Fourth Proportional to 139,500.65, 192,525.93 and 79,064.80

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Solution

The fourth proportional to 139,500.65, 192,525.93 and 79,064.80 is: 109,117.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,500.65 : 192,525.93 = 79,064.80 : x
  2. Step 2: Convert to fraction form
    139,500.65/192,525.93 = 79,064.80/x
  3. Step 3: Cross multiply
    139,500.65x = 192,525.93 × 79,064.80
  4. Step 4: Simplify right side
    139,500.65x = 15,222,023,668.95
  5. Step 5: Solve for x
    x = 15,222,023,668.95/139,500.65
  6. Step 6: Final answer
    x = 109,117.94

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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.