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Finding the Fourth Proportional to 76,551.72, 114,814.62 and 21,147.88

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Solution

The fourth proportional to 76,551.72, 114,814.62 and 21,147.88 is: 31,718.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,551.72 : 114,814.62 = 21,147.88 : x
  2. Step 2: Convert to fraction form
    76,551.72/114,814.62 = 21,147.88/x
  3. Step 3: Cross multiply
    76,551.72x = 114,814.62 × 21,147.88
  4. Step 4: Simplify right side
    76,551.72x = 2,428,085,806.01
  5. Step 5: Solve for x
    x = 2,428,085,806.01/76,551.72
  6. Step 6: Final answer
    x = 31,718.24

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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.