Home / 156,745.20-235,247.40-72,634.80

Finding the Fourth Proportional to 156,745.20, 235,247.40 and 72,634.80

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Solution

The fourth proportional to 156,745.20, 235,247.40 and 72,634.80 is: 109,012.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,745.20 : 235,247.40 = 72,634.80 : x
  2. Step 2: Convert to fraction form
    156,745.20/235,247.40 = 72,634.80/x
  3. Step 3: Cross multiply
    156,745.20x = 235,247.40 × 72,634.80
  4. Step 4: Simplify right side
    156,745.20x = 17,087,147,849.52
  5. Step 5: Solve for x
    x = 17,087,147,849.52/156,745.20
  6. Step 6: Final answer
    x = 109,012.26

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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.