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Finding the Fourth Proportional to 70,611, 105,916.41 and 18,020.49

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Solution

The fourth proportional to 70,611, 105,916.41 and 18,020.49 is: 27,030.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,611 : 105,916.41 = 18,020.49 : x
  2. Step 2: Convert to fraction form
    70,611/105,916.41 = 18,020.49/x
  3. Step 3: Cross multiply
    70,611x = 105,916.41 × 18,020.49
  4. Step 4: Simplify right side
    70,611x = 1,908,664,987.56
  5. Step 5: Solve for x
    x = 1,908,664,987.56/70,611
  6. Step 6: Final answer
    x = 27,030.70

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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.