Home / 50,729.10-76,077.45-21,139.80

Finding the Fourth Proportional to 50,729.10, 76,077.45 and 21,139.80

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Solution

The fourth proportional to 50,729.10, 76,077.45 and 21,139.80 is: 31,702.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    50,729.10 : 76,077.45 = 21,139.80 : x
  2. Step 2: Convert to fraction form
    50,729.10/76,077.45 = 21,139.80/x
  3. Step 3: Cross multiply
    50,729.10x = 76,077.45 × 21,139.80
  4. Step 4: Simplify right side
    50,729.10x = 1,608,262,077.51
  5. Step 5: Solve for x
    x = 1,608,262,077.51/50,729.10
  6. Step 6: Final answer
    x = 31,702.95

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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.