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Finding the Fourth Proportional to 111,328.44, 153,509.60 and 85,777.80

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Solution

The fourth proportional to 111,328.44, 153,509.60 and 85,777.80 is: 118,278.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,328.44 : 153,509.60 = 85,777.80 : x
  2. Step 2: Convert to fraction form
    111,328.44/153,509.60 = 85,777.80/x
  3. Step 3: Cross multiply
    111,328.44x = 153,509.60 × 85,777.80
  4. Step 4: Simplify right side
    111,328.44x = 13,167,715,766.88
  5. Step 5: Solve for x
    x = 13,167,715,766.88/111,328.44
  6. Step 6: Final answer
    x = 118,278.09

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.