Home / 142,439.20-213,812.40-80,231.20

Finding the Fourth Proportional to 142,439.20, 213,812.40 and 80,231.20

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Solution

The fourth proportional to 142,439.20, 213,812.40 and 80,231.20 is: 120,433.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,439.20 : 213,812.40 = 80,231.20 : x
  2. Step 2: Convert to fraction form
    142,439.20/213,812.40 = 80,231.20/x
  3. Step 3: Cross multiply
    142,439.20x = 213,812.40 × 80,231.20
  4. Step 4: Simplify right side
    142,439.20x = 17,154,425,426.88
  5. Step 5: Solve for x
    x = 17,154,425,426.88/142,439.20
  6. Step 6: Final answer
    x = 120,433.32

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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.