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Finding the Fourth Proportional to 202,431.70, 303,453.15 and 157,428.10

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Solution

The fourth proportional to 202,431.70, 303,453.15 and 157,428.10 is: 235,990.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    202,431.70 : 303,453.15 = 157,428.10 : x
  2. Step 2: Convert to fraction form
    202,431.70/303,453.15 = 157,428.10/x
  3. Step 3: Cross multiply
    202,431.70x = 303,453.15 × 157,428.10
  4. Step 4: Simplify right side
    202,431.70x = 47,772,052,843.52
  5. Step 5: Solve for x
    x = 47,772,052,843.52/202,431.70
  6. Step 6: Final answer
    x = 235,990.97

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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.