Home / 142,443.20-213,818.40-80,235.20

Finding the Fourth Proportional to 142,443.20, 213,818.40 and 80,235.20

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Solution

The fourth proportional to 142,443.20, 213,818.40 and 80,235.20 is: 120,439.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,443.20 : 213,818.40 = 80,235.20 : x
  2. Step 2: Convert to fraction form
    142,443.20/213,818.40 = 80,235.20/x
  3. Step 3: Cross multiply
    142,443.20x = 213,818.40 × 80,235.20
  4. Step 4: Simplify right side
    142,443.20x = 17,155,762,087.68
  5. Step 5: Solve for x
    x = 17,155,762,087.68/142,443.20
  6. Step 6: Final answer
    x = 120,439.32

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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.