Home / 280,097.31-420,165.11-80,402.34

Finding the Fourth Proportional to 280,097.31, 420,165.11 and 80,402.34

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Solution

The fourth proportional to 280,097.31, 420,165.11 and 80,402.34 is: 120,609.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,097.31 : 420,165.11 = 80,402.34 : x
  2. Step 2: Convert to fraction form
    280,097.31/420,165.11 = 80,402.34/x
  3. Step 3: Cross multiply
    280,097.31x = 420,165.11 × 80,402.34
  4. Step 4: Simplify right side
    280,097.31x = 33,782,258,030.36
  5. Step 5: Solve for x
    x = 33,782,258,030.36/280,097.31
  6. Step 6: Final answer
    x = 120,609.01

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1.5x scale

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.