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Finding the Fourth Proportional to 245,619.20, 368,515.20 and 120,876.80

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Solution

The fourth proportional to 245,619.20, 368,515.20 and 120,876.80 is: 181,357.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,619.20 : 368,515.20 = 120,876.80 : x
  2. Step 2: Convert to fraction form
    245,619.20/368,515.20 = 120,876.80/x
  3. Step 3: Cross multiply
    245,619.20x = 368,515.20 × 120,876.80
  4. Step 4: Simplify right side
    245,619.20x = 44,544,938,127.36
  5. Step 5: Solve for x
    x = 44,544,938,127.36/245,619.20
  6. Step 6: Final answer
    x = 181,357.72

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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.