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Finding the Fourth Proportional to 65,639.77, 90,583.41 and 37,347.28

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Solution

The fourth proportional to 65,639.77, 90,583.41 and 37,347.28 is: 51,539.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,639.77 : 90,583.41 = 37,347.28 : x
  2. Step 2: Convert to fraction form
    65,639.77/90,583.41 = 37,347.28/x
  3. Step 3: Cross multiply
    65,639.77x = 90,583.41 × 37,347.28
  4. Step 4: Simplify right side
    65,639.77x = 3,383,043,890.22
  5. Step 5: Solve for x
    x = 3,383,043,890.22/65,639.77
  6. Step 6: Final answer
    x = 51,539.55

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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.