Home / 156,739.20-235,238.40-72,628.80

Finding the Fourth Proportional to 156,739.20, 235,238.40 and 72,628.80

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Solution

The fourth proportional to 156,739.20, 235,238.40 and 72,628.80 is: 109,003.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,739.20 : 235,238.40 = 72,628.80 : x
  2. Step 2: Convert to fraction form
    156,739.20/235,238.40 = 72,628.80/x
  3. Step 3: Cross multiply
    156,739.20x = 235,238.40 × 72,628.80
  4. Step 4: Simplify right side
    156,739.20x = 17,085,082,705.92
  5. Step 5: Solve for x
    x = 17,085,082,705.92/156,739.20
  6. Step 6: Final answer
    x = 109,003.25

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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.