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Finding the Fourth Proportional to 86,015.70, 129,023.55 and 23,686.20

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Solution

The fourth proportional to 86,015.70, 129,023.55 and 23,686.20 is: 35,529.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,015.70 : 129,023.55 = 23,686.20 : x
  2. Step 2: Convert to fraction form
    86,015.70/129,023.55 = 23,686.20/x
  3. Step 3: Cross multiply
    86,015.70x = 129,023.55 × 23,686.20
  4. Step 4: Simplify right side
    86,015.70x = 3,056,077,610.01
  5. Step 5: Solve for x
    x = 3,056,077,610.01/86,015.70
  6. Step 6: Final answer
    x = 35,529.30

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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.