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Finding the Fourth Proportional to 73,420.65, 110,135.16 and 20,826

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Solution

The fourth proportional to 73,420.65, 110,135.16 and 20,826 is: 31,240.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,420.65 : 110,135.16 = 20,826 : x
  2. Step 2: Convert to fraction form
    73,420.65/110,135.16 = 20,826/x
  3. Step 3: Cross multiply
    73,420.65x = 110,135.16 × 20,826
  4. Step 4: Simplify right side
    73,420.65x = 2,293,674,842.16
  5. Step 5: Solve for x
    x = 2,293,674,842.16/73,420.65
  6. Step 6: Final answer
    x = 31,240.19

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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.