Home / 80,712.84-121,028.90-30,094.72

Finding the Fourth Proportional to 80,712.84, 121,028.90 and 30,094.72

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Solution

The fourth proportional to 80,712.84, 121,028.90 and 30,094.72 is: 45,127.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,712.84 : 121,028.90 = 30,094.72 : x
  2. Step 2: Convert to fraction form
    80,712.84/121,028.90 = 30,094.72/x
  3. Step 3: Cross multiply
    80,712.84x = 121,028.90 × 30,094.72
  4. Step 4: Simplify right side
    80,712.84x = 3,642,330,857.41
  5. Step 5: Solve for x
    x = 3,642,330,857.41/80,712.84
  6. Step 6: Final answer
    x = 45,127.03

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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.