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Finding the Fourth Proportional to 84,622.89, 126,940.71 and 28,463.16

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Solution

The fourth proportional to 84,622.89, 126,940.71 and 28,463.16 is: 42,696.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,622.89 : 126,940.71 = 28,463.16 : x
  2. Step 2: Convert to fraction form
    84,622.89/126,940.71 = 28,463.16/x
  3. Step 3: Cross multiply
    84,622.89x = 126,940.71 × 28,463.16
  4. Step 4: Simplify right side
    84,622.89x = 3,613,133,739.24
  5. Step 5: Solve for x
    x = 3,613,133,739.24/84,622.89
  6. Step 6: Final answer
    x = 42,696.88

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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.