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Finding the Fourth Proportional to 51,232.40, 77,021.40 and 43,629.20

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Solution

The fourth proportional to 51,232.40, 77,021.40 and 43,629.20 is: 65,590.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,232.40 : 77,021.40 = 43,629.20 : x
  2. Step 2: Convert to fraction form
    51,232.40/77,021.40 = 43,629.20/x
  3. Step 3: Cross multiply
    51,232.40x = 77,021.40 × 43,629.20
  4. Step 4: Simplify right side
    51,232.40x = 3,360,382,064.88
  5. Step 5: Solve for x
    x = 3,360,382,064.88/51,232.40
  6. Step 6: Final answer
    x = 65,590.96

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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.