Home / 30,116.64-45,144.87-20,129.79

Finding the Fourth Proportional to 30,116.64, 45,144.87 and 20,129.79

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Solution

The fourth proportional to 30,116.64, 45,144.87 and 20,129.79 is: 30,174.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,116.64 : 45,144.87 = 20,129.79 : x
  2. Step 2: Convert to fraction form
    30,116.64/45,144.87 = 20,129.79/x
  3. Step 3: Cross multiply
    30,116.64x = 45,144.87 × 20,129.79
  4. Step 4: Simplify right side
    30,116.64x = 908,756,752.68
  5. Step 5: Solve for x
    x = 908,756,752.68/30,116.64
  6. Step 6: Final answer
    x = 30,174.57

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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.