Home / 65,845.90-90,868.62-38,978.61

Finding the Fourth Proportional to 65,845.90, 90,868.62 and 38,978.61

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Solution

The fourth proportional to 65,845.90, 90,868.62 and 38,978.61 is: 53,791.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,845.90 : 90,868.62 = 38,978.61 : x
  2. Step 2: Convert to fraction form
    65,845.90/90,868.62 = 38,978.61/x
  3. Step 3: Cross multiply
    65,845.90x = 90,868.62 × 38,978.61
  4. Step 4: Simplify right side
    65,845.90x = 3,541,932,500.22
  5. Step 5: Solve for x
    x = 3,541,932,500.22/65,845.90
  6. Step 6: Final answer
    x = 53,791.24

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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.