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Finding the Fourth Proportional to 85,467.48, 128,247.12 and 43,914.48

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Solution

The fourth proportional to 85,467.48, 128,247.12 and 43,914.48 is: 65,895.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,467.48 : 128,247.12 = 43,914.48 : x
  2. Step 2: Convert to fraction form
    85,467.48/128,247.12 = 43,914.48/x
  3. Step 3: Cross multiply
    85,467.48x = 128,247.12 × 43,914.48
  4. Step 4: Simplify right side
    85,467.48x = 5,631,905,586.30
  5. Step 5: Solve for x
    x = 5,631,905,586.30/85,467.48
  6. Step 6: Final answer
    x = 65,895.30

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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.