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Finding the Fourth Proportional to 118,690.60, 178,136.70 and 48,620.20

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Solution

The fourth proportional to 118,690.60, 178,136.70 and 48,620.20 is: 72,971.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,690.60 : 178,136.70 = 48,620.20 : x
  2. Step 2: Convert to fraction form
    118,690.60/178,136.70 = 48,620.20/x
  3. Step 3: Cross multiply
    118,690.60x = 178,136.70 × 48,620.20
  4. Step 4: Simplify right side
    118,690.60x = 8,661,041,981.34
  5. Step 5: Solve for x
    x = 8,661,041,981.34/118,690.60
  6. Step 6: Final answer
    x = 72,971.59

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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.