Home / 103,973.67-143,314.43-81,272.61

Finding the Fourth Proportional to 103,973.67, 143,314.43 and 81,272.61

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Solution

The fourth proportional to 103,973.67, 143,314.43 and 81,272.61 is: 112,023.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,973.67 : 143,314.43 = 81,272.61 : x
  2. Step 2: Convert to fraction form
    103,973.67/143,314.43 = 81,272.61/x
  3. Step 3: Cross multiply
    103,973.67x = 143,314.43 × 81,272.61
  4. Step 4: Simplify right side
    103,973.67x = 11,647,537,370.40
  5. Step 5: Solve for x
    x = 11,647,537,370.40/103,973.67
  6. Step 6: Final answer
    x = 112,023.91

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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.