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Finding the Fourth Proportional to 170,840.80, 256,370.55 and 99,763.30

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Solution

The fourth proportional to 170,840.80, 256,370.55 and 99,763.30 is: 149,708.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    170,840.80 : 256,370.55 = 99,763.30 : x
  2. Step 2: Convert to fraction form
    170,840.80/256,370.55 = 99,763.30/x
  3. Step 3: Cross multiply
    170,840.80x = 256,370.55 × 99,763.30
  4. Step 4: Simplify right side
    170,840.80x = 25,576,372,090.82
  5. Step 5: Solve for x
    x = 25,576,372,090.82/170,840.80
  6. Step 6: Final answer
    x = 149,708.81

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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.