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Finding the Fourth Proportional to 142,443.70, 213,819.15 and 80,235.70

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Solution

The fourth proportional to 142,443.70, 213,819.15 and 80,235.70 is: 120,440.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,443.70 : 213,819.15 = 80,235.70 : x
  2. Step 2: Convert to fraction form
    142,443.70/213,819.15 = 80,235.70/x
  3. Step 3: Cross multiply
    142,443.70x = 213,819.15 × 80,235.70
  4. Step 4: Simplify right side
    142,443.70x = 17,155,929,173.66
  5. Step 5: Solve for x
    x = 17,155,929,173.66/142,443.70
  6. Step 6: Final answer
    x = 120,440.07

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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.