Home / 78,629.10-117,814.05-65,409.90

Finding the Fourth Proportional to 78,629.10, 117,814.05 and 65,409.90

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Solution

The fourth proportional to 78,629.10, 117,814.05 and 65,409.90 is: 98,007.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,629.10 : 117,814.05 = 65,409.90 : x
  2. Step 2: Convert to fraction form
    78,629.10/117,814.05 = 65,409.90/x
  3. Step 3: Cross multiply
    78,629.10x = 117,814.05 × 65,409.90
  4. Step 4: Simplify right side
    78,629.10x = 7,706,205,229.10
  5. Step 5: Solve for x
    x = 7,706,205,229.10/78,629.10
  6. Step 6: Final answer
    x = 98,007.04

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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.