Home / 77,820.24-108,116.94-76,887.12

Finding the Fourth Proportional to 77,820.24, 108,116.94 and 76,887.12

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Solution

The fourth proportional to 77,820.24, 108,116.94 and 76,887.12 is: 106,820.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,820.24 : 108,116.94 = 76,887.12 : x
  2. Step 2: Convert to fraction form
    77,820.24/108,116.94 = 76,887.12/x
  3. Step 3: Cross multiply
    77,820.24x = 108,116.94 × 76,887.12
  4. Step 4: Simplify right side
    77,820.24x = 8,312,800,139.81
  5. Step 5: Solve for x
    x = 8,312,800,139.81/77,820.24
  6. Step 6: Final answer
    x = 106,820.54

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.