Home / 78,646.45-117,976.48-21,720.38

Finding the Fourth Proportional to 78,646.45, 117,976.48 and 21,720.38

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Solution

The fourth proportional to 78,646.45, 117,976.48 and 21,720.38 is: 32,582.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,646.45 : 117,976.48 = 21,720.38 : x
  2. Step 2: Convert to fraction form
    78,646.45/117,976.48 = 21,720.38/x
  3. Step 3: Cross multiply
    78,646.45x = 117,976.48 × 21,720.38
  4. Step 4: Simplify right side
    78,646.45x = 2,562,493,786.47
  5. Step 5: Solve for x
    x = 2,562,493,786.47/78,646.45
  6. Step 6: Final answer
    x = 32,582.45

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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.