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Finding the Fourth Proportional to 420,015.49, 630,022.01 and 104,472.38

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Solution

The fourth proportional to 420,015.49, 630,022.01 and 104,472.38 is: 156,708.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,015.49 : 630,022.01 = 104,472.38 : x
  2. Step 2: Convert to fraction form
    420,015.49/630,022.01 = 104,472.38/x
  3. Step 3: Cross multiply
    420,015.49x = 630,022.01 × 104,472.38
  4. Step 4: Simplify right side
    420,015.49x = 65,819,899,889.78
  5. Step 5: Solve for x
    x = 65,819,899,889.78/420,015.49
  6. Step 6: Final answer
    x = 156,708.27

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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.