Home / 156,930.30-235,395.45-78,198.30

Finding the Fourth Proportional to 156,930.30, 235,395.45 and 78,198.30

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Solution

The fourth proportional to 156,930.30, 235,395.45 and 78,198.30 is: 117,297.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,930.30 : 235,395.45 = 78,198.30 : x
  2. Step 2: Convert to fraction form
    156,930.30/235,395.45 = 78,198.30/x
  3. Step 3: Cross multiply
    156,930.30x = 235,395.45 × 78,198.30
  4. Step 4: Simplify right side
    156,930.30x = 18,407,524,017.74
  5. Step 5: Solve for x
    x = 18,407,524,017.74/156,930.30
  6. Step 6: Final answer
    x = 117,297.45

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1.5x scale

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.