Home / 80,685.32-121,047.11-51,128.01

Finding the Fourth Proportional to 80,685.32, 121,047.11 and 51,128.01

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Solution

The fourth proportional to 80,685.32, 121,047.11 and 51,128.01 is: 76,704.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,685.32 : 121,047.11 = 51,128.01 : x
  2. Step 2: Convert to fraction form
    80,685.32/121,047.11 = 51,128.01/x
  3. Step 3: Cross multiply
    80,685.32x = 121,047.11 × 51,128.01
  4. Step 4: Simplify right side
    80,685.32x = 6,188,897,786.64
  5. Step 5: Solve for x
    x = 6,188,897,786.64/80,685.32
  6. Step 6: Final answer
    x = 76,704.14

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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.