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Finding the Fourth Proportional to 139,838.58, 192,980.22 and 76,176.24

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Solution

The fourth proportional to 139,838.58, 192,980.22 and 76,176.24 is: 105,124.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,838.58 : 192,980.22 = 76,176.24 : x
  2. Step 2: Convert to fraction form
    139,838.58/192,980.22 = 76,176.24/x
  3. Step 3: Cross multiply
    139,838.58x = 192,980.22 × 76,176.24
  4. Step 4: Simplify right side
    139,838.58x = 14,700,507,553.97
  5. Step 5: Solve for x
    x = 14,700,507,553.97/139,838.58
  6. Step 6: Final answer
    x = 105,124.83

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1.5x scale

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.