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Finding the Fourth Proportional to 118,698.40, 178,436.40 and 83,879.20

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Solution

The fourth proportional to 118,698.40, 178,436.40 and 83,879.20 is: 126,093.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,698.40 : 178,436.40 = 83,879.20 : x
  2. Step 2: Convert to fraction form
    118,698.40/178,436.40 = 83,879.20/x
  3. Step 3: Cross multiply
    118,698.40x = 178,436.40 × 83,879.20
  4. Step 4: Simplify right side
    118,698.40x = 14,967,102,482.88
  5. Step 5: Solve for x
    x = 14,967,102,482.88/118,698.40
  6. Step 6: Final answer
    x = 126,093.55

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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.