Home / 78,195.22-107,971.50-72,224.70

Finding the Fourth Proportional to 78,195.22, 107,971.50 and 72,224.70

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Solution

The fourth proportional to 78,195.22, 107,971.50 and 72,224.70 is: 99,727.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,195.22 : 107,971.50 = 72,224.70 : x
  2. Step 2: Convert to fraction form
    78,195.22/107,971.50 = 72,224.70/x
  3. Step 3: Cross multiply
    78,195.22x = 107,971.50 × 72,224.70
  4. Step 4: Simplify right side
    78,195.22x = 7,798,209,196.05
  5. Step 5: Solve for x
    x = 7,798,209,196.05/78,195.22
  6. Step 6: Final answer
    x = 99,727.44

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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.