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Finding the Fourth Proportional to 118,700.20, 178,021.50 and 39,793.96

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Solution

The fourth proportional to 118,700.20, 178,021.50 and 39,793.96 is: 59,681.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,700.20 : 178,021.50 = 39,793.96 : x
  2. Step 2: Convert to fraction form
    118,700.20/178,021.50 = 39,793.96/x
  3. Step 3: Cross multiply
    118,700.20x = 178,021.50 × 39,793.96
  4. Step 4: Simplify right side
    118,700.20x = 7,084,180,450.14
  5. Step 5: Solve for x
    x = 7,084,180,450.14/118,700.20
  6. Step 6: Final answer
    x = 59,681.28

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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.