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Finding the Fourth Proportional to 99,987.66, 150,019.41 and 60,034.56

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Solution

The fourth proportional to 99,987.66, 150,019.41 and 60,034.56 is: 90,074.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,987.66 : 150,019.41 = 60,034.56 : x
  2. Step 2: Convert to fraction form
    99,987.66/150,019.41 = 60,034.56/x
  3. Step 3: Cross multiply
    99,987.66x = 150,019.41 × 60,034.56
  4. Step 4: Simplify right side
    99,987.66x = 9,006,349,270.81
  5. Step 5: Solve for x
    x = 9,006,349,270.81/99,987.66
  6. Step 6: Final answer
    x = 90,074.61

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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.