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Finding the Fourth Proportional to 73,020.99, 100,736.96 and 42,790.98

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Solution

The fourth proportional to 73,020.99, 100,736.96 and 42,790.98 is: 59,032.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,020.99 : 100,736.96 = 42,790.98 : x
  2. Step 2: Convert to fraction form
    73,020.99/100,736.96 = 42,790.98/x
  3. Step 3: Cross multiply
    73,020.99x = 100,736.96 × 42,790.98
  4. Step 4: Simplify right side
    73,020.99x = 4,310,633,026.67
  5. Step 5: Solve for x
    x = 4,310,633,026.67/73,020.99
  6. Step 6: Final answer
    x = 59,032.79

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.