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Finding the Fourth Proportional to 199,428.40, 299,142.60 and 133,073.20

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Solution

The fourth proportional to 199,428.40, 299,142.60 and 133,073.20 is: 199,609.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    199,428.40 : 299,142.60 = 133,073.20 : x
  2. Step 2: Convert to fraction form
    199,428.40/299,142.60 = 133,073.20/x
  3. Step 3: Cross multiply
    199,428.40x = 299,142.60 × 133,073.20
  4. Step 4: Simplify right side
    199,428.40x = 39,807,863,038.32
  5. Step 5: Solve for x
    x = 39,807,863,038.32/199,428.40
  6. Step 6: Final answer
    x = 199,609.80

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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.