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Finding the Fourth Proportional to 82,687.01, 124,030.78 and 20,357.51

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Solution

The fourth proportional to 82,687.01, 124,030.78 and 20,357.51 is: 30,536.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,687.01 : 124,030.78 = 20,357.51 : x
  2. Step 2: Convert to fraction form
    82,687.01/124,030.78 = 20,357.51/x
  3. Step 3: Cross multiply
    82,687.01x = 124,030.78 × 20,357.51
  4. Step 4: Simplify right side
    82,687.01x = 2,524,957,173.11
  5. Step 5: Solve for x
    x = 2,524,957,173.11/82,687.01
  6. Step 6: Final answer
    x = 30,536.32

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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.