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Finding the Fourth Proportional to 85,129.99, 127,702.33 and 21,949.56

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Solution

The fourth proportional to 85,129.99, 127,702.33 and 21,949.56 is: 32,926.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,129.99 : 127,702.33 = 21,949.56 : x
  2. Step 2: Convert to fraction form
    85,129.99/127,702.33 = 21,949.56/x
  3. Step 3: Cross multiply
    85,129.99x = 127,702.33 × 21,949.56
  4. Step 4: Simplify right side
    85,129.99x = 2,803,009,954.47
  5. Step 5: Solve for x
    x = 2,803,009,954.47/85,129.99
  6. Step 6: Final answer
    x = 32,926.23

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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.