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Finding the Fourth Proportional to 70,610.70, 105,915.99 and 18,020.19

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Solution

The fourth proportional to 70,610.70, 105,915.99 and 18,020.19 is: 27,030.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,610.70 : 105,915.99 = 18,020.19 : x
  2. Step 2: Convert to fraction form
    70,610.70/105,915.99 = 18,020.19/x
  3. Step 3: Cross multiply
    70,610.70x = 105,915.99 × 18,020.19
  4. Step 4: Simplify right side
    70,610.70x = 1,908,626,263.84
  5. Step 5: Solve for x
    x = 1,908,626,263.84/70,610.70
  6. Step 6: Final answer
    x = 27,030.27

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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.