Home / 208,147.68-312,094.96-81,636.32

Finding the Fourth Proportional to 208,147.68, 312,094.96 and 81,636.32

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Solution

The fourth proportional to 208,147.68, 312,094.96 and 81,636.32 is: 122,404.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,147.68 : 312,094.96 = 81,636.32 : x
  2. Step 2: Convert to fraction form
    208,147.68/312,094.96 = 81,636.32/x
  3. Step 3: Cross multiply
    208,147.68x = 312,094.96 × 81,636.32
  4. Step 4: Simplify right side
    208,147.68x = 25,478,284,024.95
  5. Step 5: Solve for x
    x = 25,478,284,024.95/208,147.68
  6. Step 6: Final answer
    x = 122,404.84

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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.