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Finding the Fourth Proportional to 70,020.79, 104,990.86 and 30,559.03

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Solution

The fourth proportional to 70,020.79, 104,990.86 and 30,559.03 is: 45,820.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,020.79 : 104,990.86 = 30,559.03 : x
  2. Step 2: Convert to fraction form
    70,020.79/104,990.86 = 30,559.03/x
  3. Step 3: Cross multiply
    70,020.79x = 104,990.86 × 30,559.03
  4. Step 4: Simplify right side
    70,020.79x = 3,208,418,840.47
  5. Step 5: Solve for x
    x = 3,208,418,840.47/70,020.79
  6. Step 6: Final answer
    x = 45,820.95

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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.