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Finding the Fourth Proportional to 70,618.08, 105,930.33 and 20,020.74

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Solution

The fourth proportional to 70,618.08, 105,930.33 and 20,020.74 is: 30,032.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,618.08 : 105,930.33 = 20,020.74 : x
  2. Step 2: Convert to fraction form
    70,618.08/105,930.33 = 20,020.74/x
  3. Step 3: Cross multiply
    70,618.08x = 105,930.33 × 20,020.74
  4. Step 4: Simplify right side
    70,618.08x = 2,120,803,122.73
  5. Step 5: Solve for x
    x = 2,120,803,122.73/70,618.08
  6. Step 6: Final answer
    x = 30,032.01

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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.