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Finding the Fourth Proportional to 70,912.67, 106,365.35 and 18,320.78

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Solution

The fourth proportional to 70,912.67, 106,365.35 and 18,320.78 is: 27,480.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,912.67 : 106,365.35 = 18,320.78 : x
  2. Step 2: Convert to fraction form
    70,912.67/106,365.35 = 18,320.78/x
  3. Step 3: Cross multiply
    70,912.67x = 106,365.35 × 18,320.78
  4. Step 4: Simplify right side
    70,912.67x = 1,948,696,488.69
  5. Step 5: Solve for x
    x = 1,948,696,488.69/70,912.67
  6. Step 6: Final answer
    x = 27,480.23

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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.