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Finding the Fourth Proportional to 85,137.95, 127,714.25 and 21,957.50

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Solution

The fourth proportional to 85,137.95, 127,714.25 and 21,957.50 is: 32,938.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,137.95 : 127,714.25 = 21,957.50 : x
  2. Step 2: Convert to fraction form
    85,137.95/127,714.25 = 21,957.50/x
  3. Step 3: Cross multiply
    85,137.95x = 127,714.25 × 21,957.50
  4. Step 4: Simplify right side
    85,137.95x = 2,804,285,644.38
  5. Step 5: Solve for x
    x = 2,804,285,644.38/85,137.95
  6. Step 6: Final answer
    x = 32,938.14

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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.