Home / 205,179.78-283,152.84-128,702.10

Finding the Fourth Proportional to 205,179.78, 283,152.84 and 128,702.10

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Solution

The fourth proportional to 205,179.78, 283,152.84 and 128,702.10 is: 177,611.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,179.78 : 283,152.84 = 128,702.10 : x
  2. Step 2: Convert to fraction form
    205,179.78/283,152.84 = 128,702.10/x
  3. Step 3: Cross multiply
    205,179.78x = 283,152.84 × 128,702.10
  4. Step 4: Simplify right side
    205,179.78x = 36,442,365,128.96
  5. Step 5: Solve for x
    x = 36,442,365,128.96/205,179.78
  6. Step 6: Final answer
    x = 177,611.87

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.