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Finding the Fourth Proportional to 62,491.42, 86,278.40 and 55,765.48

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Solution

The fourth proportional to 62,491.42, 86,278.40 and 55,765.48 is: 76,992.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    62,491.42 : 86,278.40 = 55,765.48 : x
  2. Step 2: Convert to fraction form
    62,491.42/86,278.40 = 55,765.48/x
  3. Step 3: Cross multiply
    62,491.42x = 86,278.40 × 55,765.48
  4. Step 4: Simplify right side
    62,491.42x = 4,811,356,389.63
  5. Step 5: Solve for x
    x = 4,811,356,389.63/62,491.42
  6. Step 6: Final answer
    x = 76,992.27

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.