Home / 142,639.20-214,112.40-80,431.20

Finding the Fourth Proportional to 142,639.20, 214,112.40 and 80,431.20

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Solution

The fourth proportional to 142,639.20, 214,112.40 and 80,431.20 is: 120,733.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,639.20 : 214,112.40 = 80,431.20 : x
  2. Step 2: Convert to fraction form
    142,639.20/214,112.40 = 80,431.20/x
  3. Step 3: Cross multiply
    142,639.20x = 214,112.40 × 80,431.20
  4. Step 4: Simplify right side
    142,639.20x = 17,221,317,266.88
  5. Step 5: Solve for x
    x = 17,221,317,266.88/142,639.20
  6. Step 6: Final answer
    x = 120,733.41

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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.