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Finding the Fourth Proportional to 85,409.56, 128,114.34 and 43,283.08

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Solution

The fourth proportional to 85,409.56, 128,114.34 and 43,283.08 is: 64,924.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,409.56 : 128,114.34 = 43,283.08 : x
  2. Step 2: Convert to fraction form
    85,409.56/128,114.34 = 43,283.08/x
  3. Step 3: Cross multiply
    85,409.56x = 128,114.34 × 43,283.08
  4. Step 4: Simplify right side
    85,409.56x = 5,545,183,227.37
  5. Step 5: Solve for x
    x = 5,545,183,227.37/85,409.56
  6. Step 6: Final answer
    x = 64,924.62

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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.