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Finding the Fourth Proportional to 56,262.76, 84,399.90 and 21,231.88

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Solution

The fourth proportional to 56,262.76, 84,399.90 and 21,231.88 is: 31,849.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,262.76 : 84,399.90 = 21,231.88 : x
  2. Step 2: Convert to fraction form
    56,262.76/84,399.90 = 21,231.88/x
  3. Step 3: Cross multiply
    56,262.76x = 84,399.90 × 21,231.88
  4. Step 4: Simplify right side
    56,262.76x = 1,791,968,548.81
  5. Step 5: Solve for x
    x = 1,791,968,548.81/56,262.76
  6. Step 6: Final answer
    x = 31,849.99

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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.