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Finding the Fourth Proportional to 170,643.26, 255,765.56 and 128,387.56

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Solution

The fourth proportional to 170,643.26, 255,765.56 and 128,387.56 is: 192,431.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    170,643.26 : 255,765.56 = 128,387.56 : x
  2. Step 2: Convert to fraction form
    170,643.26/255,765.56 = 128,387.56/x
  3. Step 3: Cross multiply
    170,643.26x = 255,765.56 × 128,387.56
  4. Step 4: Simplify right side
    170,643.26x = 32,837,116,180.43
  5. Step 5: Solve for x
    x = 32,837,116,180.43/170,643.26
  6. Step 6: Final answer
    x = 192,431.37

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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.