Home / 81,813.15-122,689.33-28,491.44

Finding the Fourth Proportional to 81,813.15, 122,689.33 and 28,491.44

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Solution

The fourth proportional to 81,813.15, 122,689.33 and 28,491.44 is: 42,726.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,813.15 : 122,689.33 = 28,491.44 : x
  2. Step 2: Convert to fraction form
    81,813.15/122,689.33 = 28,491.44/x
  3. Step 3: Cross multiply
    81,813.15x = 122,689.33 × 28,491.44
  4. Step 4: Simplify right side
    81,813.15x = 3,495,594,999.66
  5. Step 5: Solve for x
    x = 3,495,594,999.66/81,813.15
  6. Step 6: Final answer
    x = 42,726.57

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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.