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Finding the Fourth Proportional to 79,879.03, 110,130.75 and 65,486.76

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Solution

The fourth proportional to 79,879.03, 110,130.75 and 65,486.76 is: 90,287.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,879.03 : 110,130.75 = 65,486.76 : x
  2. Step 2: Convert to fraction form
    79,879.03/110,130.75 = 65,486.76/x
  3. Step 3: Cross multiply
    79,879.03x = 110,130.75 × 65,486.76
  4. Step 4: Simplify right side
    79,879.03x = 7,212,105,993.87
  5. Step 5: Solve for x
    x = 7,212,105,993.87/79,879.03
  6. Step 6: Final answer
    x = 90,287.85

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1.5x scale

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.