Home / 100,216.22-137,983.65-85,077.50

Finding the Fourth Proportional to 100,216.22, 137,983.65 and 85,077.50

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Solution

The fourth proportional to 100,216.22, 137,983.65 and 85,077.50 is: 117,139.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,216.22 : 137,983.65 = 85,077.50 : x
  2. Step 2: Convert to fraction form
    100,216.22/137,983.65 = 85,077.50/x
  3. Step 3: Cross multiply
    100,216.22x = 137,983.65 × 85,077.50
  4. Step 4: Simplify right side
    100,216.22x = 11,739,303,982.88
  5. Step 5: Solve for x
    x = 11,739,303,982.88/100,216.22
  6. Step 6: Final answer
    x = 117,139.76

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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.