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Finding the Fourth Proportional to 118,311.20, 177,121.20 and 105,869.60

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Solution

The fourth proportional to 118,311.20, 177,121.20 and 105,869.60 is: 158,495.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,311.20 : 177,121.20 = 105,869.60 : x
  2. Step 2: Convert to fraction form
    118,311.20/177,121.20 = 105,869.60/x
  3. Step 3: Cross multiply
    118,311.20x = 177,121.20 × 105,869.60
  4. Step 4: Simplify right side
    118,311.20x = 18,751,750,595.52
  5. Step 5: Solve for x
    x = 18,751,750,595.52/118,311.20
  6. Step 6: Final answer
    x = 158,495.14

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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.