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Finding the Fourth Proportional to 139,838.46, 192,976.02 and 76,176.24

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Solution

The fourth proportional to 139,838.46, 192,976.02 and 76,176.24 is: 105,122.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,838.46 : 192,976.02 = 76,176.24 : x
  2. Step 2: Convert to fraction form
    139,838.46/192,976.02 = 76,176.24/x
  3. Step 3: Cross multiply
    139,838.46x = 192,976.02 × 76,176.24
  4. Step 4: Simplify right side
    139,838.46x = 14,700,187,613.76
  5. Step 5: Solve for x
    x = 14,700,187,613.76/139,838.46
  6. Step 6: Final answer
    x = 105,122.64

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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.