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Finding the Fourth Proportional to 245,621.20, 368,518.20 and 120,878.80

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Solution

The fourth proportional to 245,621.20, 368,518.20 and 120,878.80 is: 181,360.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,621.20 : 368,518.20 = 120,878.80 : x
  2. Step 2: Convert to fraction form
    245,621.20/368,518.20 = 120,878.80/x
  3. Step 3: Cross multiply
    245,621.20x = 368,518.20 × 120,878.80
  4. Step 4: Simplify right side
    245,621.20x = 44,546,037,794.16
  5. Step 5: Solve for x
    x = 44,546,037,794.16/245,621.20
  6. Step 6: Final answer
    x = 181,360.72

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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.