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Finding the Fourth Proportional to 118,015.80, 177,369.30 and 102,809.40

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Solution

The fourth proportional to 118,015.80, 177,369.30 and 102,809.40 is: 154,515.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,015.80 : 177,369.30 = 102,809.40 : x
  2. Step 2: Convert to fraction form
    118,015.80/177,369.30 = 102,809.40/x
  3. Step 3: Cross multiply
    118,015.80x = 177,369.30 × 102,809.40
  4. Step 4: Simplify right side
    118,015.80x = 18,235,231,311.42
  5. Step 5: Solve for x
    x = 18,235,231,311.42/118,015.80
  6. Step 6: Final answer
    x = 154,515.17

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.