Home / 45,434.12-68,128.14-20,789

Finding the Fourth Proportional to 45,434.12, 68,128.14 and 20,789

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Solution

The fourth proportional to 45,434.12, 68,128.14 and 20,789 is: 31,172.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,434.12 : 68,128.14 = 20,789 : x
  2. Step 2: Convert to fraction form
    45,434.12/68,128.14 = 20,789/x
  3. Step 3: Cross multiply
    45,434.12x = 68,128.14 × 20,789
  4. Step 4: Simplify right side
    45,434.12x = 1,416,315,902.46
  5. Step 5: Solve for x
    x = 1,416,315,902.46/45,434.12
  6. Step 6: Final answer
    x = 31,172.96

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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.