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Finding the Fourth Proportional to 139,812.45, 192,944.94 and 76,154.34

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Solution

The fourth proportional to 139,812.45, 192,944.94 and 76,154.34 is: 105,095.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,812.45 : 192,944.94 = 76,154.34 : x
  2. Step 2: Convert to fraction form
    139,812.45/192,944.94 = 76,154.34/x
  3. Step 3: Cross multiply
    139,812.45x = 192,944.94 × 76,154.34
  4. Step 4: Simplify right side
    139,812.45x = 14,693,594,562.04
  5. Step 5: Solve for x
    x = 14,693,594,562.04/139,812.45
  6. Step 6: Final answer
    x = 105,095.04

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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.