Home / 80,719.04-121,079.28-28,128.44

Finding the Fourth Proportional to 80,719.04, 121,079.28 and 28,128.44

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Solution

The fourth proportional to 80,719.04, 121,079.28 and 28,128.44 is: 42,192.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,719.04 : 121,079.28 = 28,128.44 : x
  2. Step 2: Convert to fraction form
    80,719.04/121,079.28 = 28,128.44/x
  3. Step 3: Cross multiply
    80,719.04x = 121,079.28 × 28,128.44
  4. Step 4: Simplify right side
    80,719.04x = 3,405,771,262.72
  5. Step 5: Solve for x
    x = 3,405,771,262.72/80,719.04
  6. Step 6: Final answer
    x = 42,192.91

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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.