Home / 81,811.17-122,736.50-28,495.35

Finding the Fourth Proportional to 81,811.17, 122,736.50 and 28,495.35

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Solution

The fourth proportional to 81,811.17, 122,736.50 and 28,495.35 is: 42,749.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,811.17 : 122,736.50 = 28,495.35 : x
  2. Step 2: Convert to fraction form
    81,811.17/122,736.50 = 28,495.35/x
  3. Step 3: Cross multiply
    81,811.17x = 122,736.50 × 28,495.35
  4. Step 4: Simplify right side
    81,811.17x = 3,497,418,769.12
  5. Step 5: Solve for x
    x = 3,497,418,769.12/81,811.17
  6. Step 6: Final answer
    x = 42,749.90

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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.