Home / 141,321.08-212,054.26-78,129.48

Finding the Fourth Proportional to 141,321.08, 212,054.26 and 78,129.48

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Solution

The fourth proportional to 141,321.08, 212,054.26 and 78,129.48 is: 117,234.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    141,321.08 : 212,054.26 = 78,129.48 : x
  2. Step 2: Convert to fraction form
    141,321.08/212,054.26 = 78,129.48/x
  3. Step 3: Cross multiply
    141,321.08x = 212,054.26 × 78,129.48
  4. Step 4: Simplify right side
    141,321.08x = 16,567,689,065.58
  5. Step 5: Solve for x
    x = 16,567,689,065.58/141,321.08
  6. Step 6: Final answer
    x = 117,234.38

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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.