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Finding the Fourth Proportional to 70,661.90, 106,003.60 and 43,986.30

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Solution

The fourth proportional to 70,661.90, 106,003.60 and 43,986.30 is: 65,986.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,661.90 : 106,003.60 = 43,986.30 : x
  2. Step 2: Convert to fraction form
    70,661.90/106,003.60 = 43,986.30/x
  3. Step 3: Cross multiply
    70,661.90x = 106,003.60 × 43,986.30
  4. Step 4: Simplify right side
    70,661.90x = 4,662,706,040.71
  5. Step 5: Solve for x
    x = 4,662,706,040.71/70,661.90
  6. Step 6: Final answer
    x = 65,986.14

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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.