Home / 84,405.40-116,619.83-66,636.43

Finding the Fourth Proportional to 84,405.40, 116,619.83 and 66,636.43

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Solution

The fourth proportional to 84,405.40, 116,619.83 and 66,636.43 is: 92,069.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,405.40 : 116,619.83 = 66,636.43 : x
  2. Step 2: Convert to fraction form
    84,405.40/116,619.83 = 66,636.43/x
  3. Step 3: Cross multiply
    84,405.40x = 116,619.83 × 66,636.43
  4. Step 4: Simplify right side
    84,405.40x = 7,771,129,138.41
  5. Step 5: Solve for x
    x = 7,771,129,138.41/84,405.40
  6. Step 6: Final answer
    x = 92,069.10

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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.