Home / 80,407.28-111,470.28-76,141.44

Finding the Fourth Proportional to 80,407.28, 111,470.28 and 76,141.44

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Solution

The fourth proportional to 80,407.28, 111,470.28 and 76,141.44 is: 105,556.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,407.28 : 111,470.28 = 76,141.44 : x
  2. Step 2: Convert to fraction form
    80,407.28/111,470.28 = 76,141.44/x
  3. Step 3: Cross multiply
    80,407.28x = 111,470.28 × 76,141.44
  4. Step 4: Simplify right side
    80,407.28x = 8,487,507,636.40
  5. Step 5: Solve for x
    x = 8,487,507,636.40/80,407.28
  6. Step 6: Final answer
    x = 105,556.46

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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.