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Finding the Fourth Proportional to 70,799.70, 106,190.45 and 20,885.07

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Solution

The fourth proportional to 70,799.70, 106,190.45 and 20,885.07 is: 31,324.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,799.70 : 106,190.45 = 20,885.07 : x
  2. Step 2: Convert to fraction form
    70,799.70/106,190.45 = 20,885.07/x
  3. Step 3: Cross multiply
    70,799.70x = 106,190.45 × 20,885.07
  4. Step 4: Simplify right side
    70,799.70x = 2,217,794,877.16
  5. Step 5: Solve for x
    x = 2,217,794,877.16/70,799.70
  6. Step 6: Final answer
    x = 31,324.92

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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.