Home / 65,640.21-90,723.24-57,865.41

Finding the Fourth Proportional to 65,640.21, 90,723.24 and 57,865.41

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Solution

The fourth proportional to 65,640.21, 90,723.24 and 57,865.41 is: 79,977.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,640.21 : 90,723.24 = 57,865.41 : x
  2. Step 2: Convert to fraction form
    65,640.21/90,723.24 = 57,865.41/x
  3. Step 3: Cross multiply
    65,640.21x = 90,723.24 × 57,865.41
  4. Step 4: Simplify right side
    65,640.21x = 5,249,737,479.13
  5. Step 5: Solve for x
    x = 5,249,737,479.13/65,640.21
  6. Step 6: Final answer
    x = 79,977.46

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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.