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Finding the Fourth Proportional to 139,817.55, 192,949.16 and 76,154.79

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Solution

The fourth proportional to 139,817.55, 192,949.16 and 76,154.79 is: 105,094.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,817.55 : 192,949.16 = 76,154.79 : x
  2. Step 2: Convert to fraction form
    139,817.55/192,949.16 = 76,154.79/x
  3. Step 3: Cross multiply
    139,817.55x = 192,949.16 × 76,154.79
  4. Step 4: Simplify right side
    139,817.55x = 14,694,002,379.70
  5. Step 5: Solve for x
    x = 14,694,002,379.70/139,817.55
  6. Step 6: Final answer
    x = 105,094.12

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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.