Home / 80,301.16-120,459.18-21,137.08

Finding the Fourth Proportional to 80,301.16, 120,459.18 and 21,137.08

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Solution

The fourth proportional to 80,301.16, 120,459.18 and 21,137.08 is: 31,707.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,301.16 : 120,459.18 = 21,137.08 : x
  2. Step 2: Convert to fraction form
    80,301.16/120,459.18 = 21,137.08/x
  3. Step 3: Cross multiply
    80,301.16x = 120,459.18 × 21,137.08
  4. Step 4: Simplify right side
    80,301.16x = 2,546,155,324.39
  5. Step 5: Solve for x
    x = 2,546,155,324.39/80,301.16
  6. Step 6: Final answer
    x = 31,707.58

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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.