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Finding the Fourth Proportional to 124,145.52, 186,136.68 and 81,896.76

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Solution

The fourth proportional to 124,145.52, 186,136.68 and 81,896.76 is: 122,791.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,145.52 : 186,136.68 = 81,896.76 : x
  2. Step 2: Convert to fraction form
    124,145.52/186,136.68 = 81,896.76/x
  3. Step 3: Cross multiply
    124,145.52x = 186,136.68 × 81,896.76
  4. Step 4: Simplify right side
    124,145.52x = 15,243,991,009.16
  5. Step 5: Solve for x
    x = 15,243,991,009.16/124,145.52
  6. Step 6: Final answer
    x = 122,791.31

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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.