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Finding the Fourth Proportional to 86,050.66, 129,089.13 and 43,907.76

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Solution

The fourth proportional to 86,050.66, 129,089.13 and 43,907.76 is: 65,868.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,050.66 : 129,089.13 = 43,907.76 : x
  2. Step 2: Convert to fraction form
    86,050.66/129,089.13 = 43,907.76/x
  3. Step 3: Cross multiply
    86,050.66x = 129,089.13 × 43,907.76
  4. Step 4: Simplify right side
    86,050.66x = 5,668,014,538.65
  5. Step 5: Solve for x
    x = 5,668,014,538.65/86,050.66
  6. Step 6: Final answer
    x = 65,868.34

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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.