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Finding the Fourth Proportional to 86,556, 119,447.28 and 61,449.24

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Solution

The fourth proportional to 86,556, 119,447.28 and 61,449.24 is: 84,799.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,556 : 119,447.28 = 61,449.24 : x
  2. Step 2: Convert to fraction form
    86,556/119,447.28 = 61,449.24/x
  3. Step 3: Cross multiply
    86,556x = 119,447.28 × 61,449.24
  4. Step 4: Simplify right side
    86,556x = 7,339,944,576.07
  5. Step 5: Solve for x
    x = 7,339,944,576.07/86,556
  6. Step 6: Final answer
    x = 84,799.95

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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.