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Finding the Fourth Proportional to 161,999.81, 223,559.87 and 90,379.85

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Solution

The fourth proportional to 161,999.81, 223,559.87 and 90,379.85 is: 124,724.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    161,999.81 : 223,559.87 = 90,379.85 : x
  2. Step 2: Convert to fraction form
    161,999.81/223,559.87 = 90,379.85/x
  3. Step 3: Cross multiply
    161,999.81x = 223,559.87 × 90,379.85
  4. Step 4: Simplify right side
    161,999.81x = 20,205,307,967.03
  5. Step 5: Solve for x
    x = 20,205,307,967.03/161,999.81
  6. Step 6: Final answer
    x = 124,724.27

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1.5x scale

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.