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Finding the Fourth Proportional to 70,889.39, 106,349.66 and 20,965.60

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Solution

The fourth proportional to 70,889.39, 106,349.66 and 20,965.60 is: 31,453.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,889.39 : 106,349.66 = 20,965.60 : x
  2. Step 2: Convert to fraction form
    70,889.39/106,349.66 = 20,965.60/x
  3. Step 3: Cross multiply
    70,889.39x = 106,349.66 × 20,965.60
  4. Step 4: Simplify right side
    70,889.39x = 2,229,683,900.90
  5. Step 5: Solve for x
    x = 2,229,683,900.90/70,889.39
  6. Step 6: Final answer
    x = 31,453.00

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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.