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Finding the Fourth Proportional to 80,716.58, 121,014.58 and 55,685.22

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Solution

The fourth proportional to 80,716.58, 121,014.58 and 55,685.22 is: 83,486.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,716.58 : 121,014.58 = 55,685.22 : x
  2. Step 2: Convert to fraction form
    80,716.58/121,014.58 = 55,685.22/x
  3. Step 3: Cross multiply
    80,716.58x = 121,014.58 × 55,685.22
  4. Step 4: Simplify right side
    80,716.58x = 6,738,723,510.51
  5. Step 5: Solve for x
    x = 6,738,723,510.51/80,716.58
  6. Step 6: Final answer
    x = 83,486.24

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.