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Finding the Fourth Proportional to 199,712.60, 299,661.53 and 87,378.03

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Solution

The fourth proportional to 199,712.60, 299,661.53 and 87,378.03 is: 131,107.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    199,712.60 : 299,661.53 = 87,378.03 : x
  2. Step 2: Convert to fraction form
    199,712.60/299,661.53 = 87,378.03/x
  3. Step 3: Cross multiply
    199,712.60x = 299,661.53 × 87,378.03
  4. Step 4: Simplify right side
    199,712.60x = 26,183,833,721.30
  5. Step 5: Solve for x
    x = 26,183,833,721.30/199,712.60
  6. Step 6: Final answer
    x = 131,107.57

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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.