Home / 205,826.40-308,739.60-72,856.80

Finding the Fourth Proportional to 205,826.40, 308,739.60 and 72,856.80

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Solution

The fourth proportional to 205,826.40, 308,739.60 and 72,856.80 is: 109,285.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,826.40 : 308,739.60 = 72,856.80 : x
  2. Step 2: Convert to fraction form
    205,826.40/308,739.60 = 72,856.80/x
  3. Step 3: Cross multiply
    205,826.40x = 308,739.60 × 72,856.80
  4. Step 4: Simplify right side
    205,826.40x = 22,493,779,289.28
  5. Step 5: Solve for x
    x = 22,493,779,289.28/205,826.40
  6. Step 6: Final answer
    x = 109,285.20

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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.