Home / 78,028.35-107,649.99-51,185.76

Finding the Fourth Proportional to 78,028.35, 107,649.99 and 51,185.76

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Solution

The fourth proportional to 78,028.35, 107,649.99 and 51,185.76 is: 70,617.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,028.35 : 107,649.99 = 51,185.76 : x
  2. Step 2: Convert to fraction form
    78,028.35/107,649.99 = 51,185.76/x
  3. Step 3: Cross multiply
    78,028.35x = 107,649.99 × 51,185.76
  4. Step 4: Simplify right side
    78,028.35x = 5,510,146,552.14
  5. Step 5: Solve for x
    x = 5,510,146,552.14/78,028.35
  6. Step 6: Final answer
    x = 70,617.24

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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.