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Finding the Fourth Proportional to 70,945.71, 106,429.52 and 21,033.51

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Solution

The fourth proportional to 70,945.71, 106,429.52 and 21,033.51 is: 31,553.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,945.71 : 106,429.52 = 21,033.51 : x
  2. Step 2: Convert to fraction form
    70,945.71/106,429.52 = 21,033.51/x
  3. Step 3: Cross multiply
    70,945.71x = 106,429.52 × 21,033.51
  4. Step 4: Simplify right side
    70,945.71x = 2,238,586,373.22
  5. Step 5: Solve for x
    x = 2,238,586,373.22/70,945.71
  6. Step 6: Final answer
    x = 31,553.51

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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.