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Finding the Fourth Proportional to 86,041.86, 129,049.47 and 43,953.06

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Solution

The fourth proportional to 86,041.86, 129,049.47 and 43,953.06 is: 65,922.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,041.86 : 129,049.47 = 43,953.06 : x
  2. Step 2: Convert to fraction form
    86,041.86/129,049.47 = 43,953.06/x
  3. Step 3: Cross multiply
    86,041.86x = 129,049.47 × 43,953.06
  4. Step 4: Simplify right side
    86,041.86x = 5,672,119,097.88
  5. Step 5: Solve for x
    x = 5,672,119,097.88/86,041.86
  6. Step 6: Final answer
    x = 65,922.79

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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.