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Finding the Fourth Proportional to 50,989.70, 76,419.65 and 28,815.45

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Solution

The fourth proportional to 50,989.70, 76,419.65 and 28,815.45 is: 43,186.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    50,989.70 : 76,419.65 = 28,815.45 : x
  2. Step 2: Convert to fraction form
    50,989.70/76,419.65 = 28,815.45/x
  3. Step 3: Cross multiply
    50,989.70x = 76,419.65 × 28,815.45
  4. Step 4: Simplify right side
    50,989.70x = 2,202,066,389.06
  5. Step 5: Solve for x
    x = 2,202,066,389.06/50,989.70
  6. Step 6: Final answer
    x = 43,186.49

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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.