Home / 80,353.19-120,530.81-55,386.54

Finding the Fourth Proportional to 80,353.19, 120,530.81 and 55,386.54

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Solution

The fourth proportional to 80,353.19, 120,530.81 and 55,386.54 is: 83,080.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,353.19 : 120,530.81 = 55,386.54 : x
  2. Step 2: Convert to fraction form
    80,353.19/120,530.81 = 55,386.54/x
  3. Step 3: Cross multiply
    80,353.19x = 120,530.81 × 55,386.54
  4. Step 4: Simplify right side
    80,353.19x = 6,675,783,926.64
  5. Step 5: Solve for x
    x = 6,675,783,926.64/80,353.19
  6. Step 6: Final answer
    x = 83,080.51

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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.