Home / 85,861.10-128,803.80-26,690.60

Finding the Fourth Proportional to 85,861.10, 128,803.80 and 26,690.60

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Solution

The fourth proportional to 85,861.10, 128,803.80 and 26,690.60 is: 40,039.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,861.10 : 128,803.80 = 26,690.60 : x
  2. Step 2: Convert to fraction form
    85,861.10/128,803.80 = 26,690.60/x
  3. Step 3: Cross multiply
    85,861.10x = 128,803.80 × 26,690.60
  4. Step 4: Simplify right side
    85,861.10x = 3,437,850,704.28
  5. Step 5: Solve for x
    x = 3,437,850,704.28/85,861.10
  6. Step 6: Final answer
    x = 40,039.68

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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.