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Finding the Fourth Proportional to 171,203.06, 256,430.10 and 86,817.80

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Solution

The fourth proportional to 171,203.06, 256,430.10 and 86,817.80 is: 130,036.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,203.06 : 256,430.10 = 86,817.80 : x
  2. Step 2: Convert to fraction form
    171,203.06/256,430.10 = 86,817.80/x
  3. Step 3: Cross multiply
    171,203.06x = 256,430.10 × 86,817.80
  4. Step 4: Simplify right side
    171,203.06x = 22,262,697,135.78
  5. Step 5: Solve for x
    x = 22,262,697,135.78/171,203.06
  6. Step 6: Final answer
    x = 130,036.79

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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.