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Finding the Fourth Proportional to 324,065.71, 486,039.79 and 87,353.03

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Solution

The fourth proportional to 324,065.71, 486,039.79 and 87,353.03 is: 131,013.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    324,065.71 : 486,039.79 = 87,353.03 : x
  2. Step 2: Convert to fraction form
    324,065.71/486,039.79 = 87,353.03/x
  3. Step 3: Cross multiply
    324,065.71x = 486,039.79 × 87,353.03
  4. Step 4: Simplify right side
    324,065.71x = 42,457,049,681.35
  5. Step 5: Solve for x
    x = 42,457,049,681.35/324,065.71
  6. Step 6: Final answer
    x = 131,013.71

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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.