Home / 120,680.36-180,785.08-79,001

Finding the Fourth Proportional to 120,680.36, 180,785.08 and 79,001

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Solution

The fourth proportional to 120,680.36, 180,785.08 and 79,001 is: 118,347.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,680.36 : 180,785.08 = 79,001 : x
  2. Step 2: Convert to fraction form
    120,680.36/180,785.08 = 79,001/x
  3. Step 3: Cross multiply
    120,680.36x = 180,785.08 × 79,001
  4. Step 4: Simplify right side
    120,680.36x = 14,282,202,105.08
  5. Step 5: Solve for x
    x = 14,282,202,105.08/120,680.36
  6. Step 6: Final answer
    x = 118,347.36

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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.