Home / 78,735.86-108,588.63-66,531.05

Finding the Fourth Proportional to 78,735.86, 108,588.63 and 66,531.05

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Solution

The fourth proportional to 78,735.86, 108,588.63 and 66,531.05 is: 91,756.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,735.86 : 108,588.63 = 66,531.05 : x
  2. Step 2: Convert to fraction form
    78,735.86/108,588.63 = 66,531.05/x
  3. Step 3: Cross multiply
    78,735.86x = 108,588.63 × 66,531.05
  4. Step 4: Simplify right side
    78,735.86x = 7,224,515,843.43
  5. Step 5: Solve for x
    x = 7,224,515,843.43/78,735.86
  6. Step 6: Final answer
    x = 91,756.36

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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.