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Finding the Fourth Proportional to 170,021.80, 254,643.90 and 86,818.60

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Solution

The fourth proportional to 170,021.80, 254,643.90 and 86,818.60 is: 130,029.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    170,021.80 : 254,643.90 = 86,818.60 : x
  2. Step 2: Convert to fraction form
    170,021.80/254,643.90 = 86,818.60/x
  3. Step 3: Cross multiply
    170,021.80x = 254,643.90 × 86,818.60
  4. Step 4: Simplify right side
    170,021.80x = 22,107,826,896.54
  5. Step 5: Solve for x
    x = 22,107,826,896.54/170,021.80
  6. Step 6: Final answer
    x = 130,029.37

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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.