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Finding the Fourth Proportional to 118,869.20, 178,303.80 and 76,878.80

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Solution

The fourth proportional to 118,869.20, 178,303.80 and 76,878.80 is: 115,318.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,869.20 : 178,303.80 = 76,878.80 : x
  2. Step 2: Convert to fraction form
    118,869.20/178,303.80 = 76,878.80/x
  3. Step 3: Cross multiply
    118,869.20x = 178,303.80 × 76,878.80
  4. Step 4: Simplify right side
    118,869.20x = 13,707,782,179.44
  5. Step 5: Solve for x
    x = 13,707,782,179.44/118,869.20
  6. Step 6: Final answer
    x = 115,318.20

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1.5x scale

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.