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Finding the Fourth Proportional to 70,699.80, 106,047.26 and 18,109.80

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Solution

The fourth proportional to 70,699.80, 106,047.26 and 18,109.80 is: 27,164.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,699.80 : 106,047.26 = 18,109.80 : x
  2. Step 2: Convert to fraction form
    70,699.80/106,047.26 = 18,109.80/x
  3. Step 3: Cross multiply
    70,699.80x = 106,047.26 × 18,109.80
  4. Step 4: Simplify right side
    70,699.80x = 1,920,494,669.15
  5. Step 5: Solve for x
    x = 1,920,494,669.15/70,699.80
  6. Step 6: Final answer
    x = 27,164.07

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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.