Home / 81,140.76-121,698.83-28,537.95

Finding the Fourth Proportional to 81,140.76, 121,698.83 and 28,537.95

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Solution

The fourth proportional to 81,140.76, 121,698.83 and 28,537.95 is: 42,802.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,140.76 : 121,698.83 = 28,537.95 : x
  2. Step 2: Convert to fraction form
    81,140.76/121,698.83 = 28,537.95/x
  3. Step 3: Cross multiply
    81,140.76x = 121,698.83 × 28,537.95
  4. Step 4: Simplify right side
    81,140.76x = 3,473,034,546.22
  5. Step 5: Solve for x
    x = 3,473,034,546.22/81,140.76
  6. Step 6: Final answer
    x = 42,802.59

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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.