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Finding the Fourth Proportional to 70,628.83, 105,943.40 and 17,321.03

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Solution

The fourth proportional to 70,628.83, 105,943.40 and 17,321.03 is: 25,981.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,628.83 : 105,943.40 = 17,321.03 : x
  2. Step 2: Convert to fraction form
    70,628.83/105,943.40 = 17,321.03/x
  3. Step 3: Cross multiply
    70,628.83x = 105,943.40 × 17,321.03
  4. Step 4: Simplify right side
    70,628.83x = 1,835,048,809.70
  5. Step 5: Solve for x
    x = 1,835,048,809.70/70,628.83
  6. Step 6: Final answer
    x = 25,981.58

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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.