Home / 156,721.20-235,211.40-72,610.80

Finding the Fourth Proportional to 156,721.20, 235,211.40 and 72,610.80

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Solution

The fourth proportional to 156,721.20, 235,211.40 and 72,610.80 is: 108,976.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,721.20 : 235,211.40 = 72,610.80 : x
  2. Step 2: Convert to fraction form
    156,721.20/235,211.40 = 72,610.80/x
  3. Step 3: Cross multiply
    156,721.20x = 235,211.40 × 72,610.80
  4. Step 4: Simplify right side
    156,721.20x = 17,078,887,923.12
  5. Step 5: Solve for x
    x = 17,078,887,923.12/156,721.20
  6. Step 6: Final answer
    x = 108,976.25

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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.