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Finding the Fourth Proportional to 259,431.68, 389,322.56 and 101,640.32

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Solution

The fourth proportional to 259,431.68, 389,322.56 and 101,640.32 is: 152,529.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,431.68 : 389,322.56 = 101,640.32 : x
  2. Step 2: Convert to fraction form
    259,431.68/389,322.56 = 101,640.32/x
  3. Step 3: Cross multiply
    259,431.68x = 389,322.56 × 101,640.32
  4. Step 4: Simplify right side
    259,431.68x = 39,570,869,581.62
  5. Step 5: Solve for x
    x = 39,570,869,581.62/259,431.68
  6. Step 6: Final answer
    x = 152,529.06

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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.