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Finding the Fourth Proportional to 118,690.60, 178,064.70 and 83,698.60

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Solution

The fourth proportional to 118,690.60, 178,064.70 and 83,698.60 is: 125,568.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,690.60 : 178,064.70 = 83,698.60 : x
  2. Step 2: Convert to fraction form
    118,690.60/178,064.70 = 83,698.60/x
  3. Step 3: Cross multiply
    118,690.60x = 178,064.70 × 83,698.60
  4. Step 4: Simplify right side
    118,690.60x = 14,903,766,099.42
  5. Step 5: Solve for x
    x = 14,903,766,099.42/118,690.60
  6. Step 6: Final answer
    x = 125,568.21

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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.