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Finding the Fourth Proportional to 142,516.80, 213,775.20 and 68,788.80

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Solution

The fourth proportional to 142,516.80, 213,775.20 and 68,788.80 is: 103,183.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,516.80 : 213,775.20 = 68,788.80 : x
  2. Step 2: Convert to fraction form
    142,516.80/213,775.20 = 68,788.80/x
  3. Step 3: Cross multiply
    142,516.80x = 213,775.20 × 68,788.80
  4. Step 4: Simplify right side
    142,516.80x = 14,705,339,477.76
  5. Step 5: Solve for x
    x = 14,705,339,477.76/142,516.80
  6. Step 6: Final answer
    x = 103,183.20

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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.