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Finding the Fourth Proportional to 60,290.86, 90,449.25 and 20,313.81

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Solution

The fourth proportional to 60,290.86, 90,449.25 and 20,313.81 is: 30,475.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,290.86 : 90,449.25 = 20,313.81 : x
  2. Step 2: Convert to fraction form
    60,290.86/90,449.25 = 20,313.81/x
  3. Step 3: Cross multiply
    60,290.86x = 90,449.25 × 20,313.81
  4. Step 4: Simplify right side
    60,290.86x = 1,837,368,879.14
  5. Step 5: Solve for x
    x = 1,837,368,879.14/60,290.86
  6. Step 6: Final answer
    x = 30,475.08

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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.