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Finding the Fourth Proportional to 58,490.70, 80,622.36 and 45,721.32

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Solution

The fourth proportional to 58,490.70, 80,622.36 and 45,721.32 is: 63,021.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,490.70 : 80,622.36 = 45,721.32 : x
  2. Step 2: Convert to fraction form
    58,490.70/80,622.36 = 45,721.32/x
  3. Step 3: Cross multiply
    58,490.70x = 80,622.36 × 45,721.32
  4. Step 4: Simplify right side
    58,490.70x = 3,686,160,720.72
  5. Step 5: Solve for x
    x = 3,686,160,720.72/58,490.70
  6. Step 6: Final answer
    x = 63,021.31

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.