Home / 208,985.20-313,477.80-68,725.60

Finding the Fourth Proportional to 208,985.20, 313,477.80 and 68,725.60

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Solution

The fourth proportional to 208,985.20, 313,477.80 and 68,725.60 is: 103,088.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,985.20 : 313,477.80 = 68,725.60 : x
  2. Step 2: Convert to fraction form
    208,985.20/313,477.80 = 68,725.60/x
  3. Step 3: Cross multiply
    208,985.20x = 313,477.80 × 68,725.60
  4. Step 4: Simplify right side
    208,985.20x = 21,543,949,891.68
  5. Step 5: Solve for x
    x = 21,543,949,891.68/208,985.20
  6. Step 6: Final answer
    x = 103,088.40

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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.