Home / 77,108.20-115,835.10-73,959.40

Finding the Fourth Proportional to 77,108.20, 115,835.10 and 73,959.40

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Solution

The fourth proportional to 77,108.20, 115,835.10 and 73,959.40 is: 111,104.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,108.20 : 115,835.10 = 73,959.40 : x
  2. Step 2: Convert to fraction form
    77,108.20/115,835.10 = 73,959.40/x
  3. Step 3: Cross multiply
    77,108.20x = 115,835.10 × 73,959.40
  4. Step 4: Simplify right side
    77,108.20x = 8,567,094,494.94
  5. Step 5: Solve for x
    x = 8,567,094,494.94/77,108.20
  6. Step 6: Final answer
    x = 111,104.84

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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.