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Finding the Fourth Proportional to 220,443.88, 330,690.14 and 70,648.68

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Solution

The fourth proportional to 220,443.88, 330,690.14 and 70,648.68 is: 105,980.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,443.88 : 330,690.14 = 70,648.68 : x
  2. Step 2: Convert to fraction form
    220,443.88/330,690.14 = 70,648.68/x
  3. Step 3: Cross multiply
    220,443.88x = 330,690.14 × 70,648.68
  4. Step 4: Simplify right side
    220,443.88x = 23,362,821,880.02
  5. Step 5: Solve for x
    x = 23,362,821,880.02/220,443.88
  6. Step 6: Final answer
    x = 105,980.81

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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.