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Finding the Fourth Proportional to 155,063.48, 213,745.14 and 129,653.96

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Solution

The fourth proportional to 155,063.48, 213,745.14 and 129,653.96 is: 178,719.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,063.48 : 213,745.14 = 129,653.96 : x
  2. Step 2: Convert to fraction form
    155,063.48/213,745.14 = 129,653.96/x
  3. Step 3: Cross multiply
    155,063.48x = 213,745.14 × 129,653.96
  4. Step 4: Simplify right side
    155,063.48x = 27,712,902,763.03
  5. Step 5: Solve for x
    x = 27,712,902,763.03/155,063.48
  6. Step 6: Final answer
    x = 178,719.73

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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.