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Finding the Fourth Proportional to 70,930.36, 106,359.09 and 21,004.19

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Solution

The fourth proportional to 70,930.36, 106,359.09 and 21,004.19 is: 31,495.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,930.36 : 106,359.09 = 21,004.19 : x
  2. Step 2: Convert to fraction form
    70,930.36/106,359.09 = 21,004.19/x
  3. Step 3: Cross multiply
    70,930.36x = 106,359.09 × 21,004.19
  4. Step 4: Simplify right side
    70,930.36x = 2,233,986,322.87
  5. Step 5: Solve for x
    x = 2,233,986,322.87/70,930.36
  6. Step 6: Final answer
    x = 31,495.49

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1.5x scale

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.