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Finding the Fourth Proportional to 205,263.40, 307,915.26 and 85,295.56

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Solution

The fourth proportional to 205,263.40, 307,915.26 and 85,295.56 is: 127,951.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,263.40 : 307,915.26 = 85,295.56 : x
  2. Step 2: Convert to fraction form
    205,263.40/307,915.26 = 85,295.56/x
  3. Step 3: Cross multiply
    205,263.40x = 307,915.26 × 85,295.56
  4. Step 4: Simplify right side
    205,263.40x = 26,263,804,534.25
  5. Step 5: Solve for x
    x = 26,263,804,534.25/205,263.40
  6. Step 6: Final answer
    x = 127,951.72

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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.