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Finding the Fourth Proportional to 54,752.40, 82,128.60 and 51,690.60

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Solution

The fourth proportional to 54,752.40, 82,128.60 and 51,690.60 is: 77,535.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,752.40 : 82,128.60 = 51,690.60 : x
  2. Step 2: Convert to fraction form
    54,752.40/82,128.60 = 51,690.60/x
  3. Step 3: Cross multiply
    54,752.40x = 82,128.60 × 51,690.60
  4. Step 4: Simplify right side
    54,752.40x = 4,245,276,611.16
  5. Step 5: Solve for x
    x = 4,245,276,611.16/54,752.40
  6. Step 6: Final answer
    x = 77,535.90

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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.