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Finding the Fourth Proportional to 166,138.20, 249,037.20 and 81,768.60

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Solution

The fourth proportional to 166,138.20, 249,037.20 and 81,768.60 is: 122,569.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    166,138.20 : 249,037.20 = 81,768.60 : x
  2. Step 2: Convert to fraction form
    166,138.20/249,037.20 = 81,768.60/x
  3. Step 3: Cross multiply
    166,138.20x = 249,037.20 × 81,768.60
  4. Step 4: Simplify right side
    166,138.20x = 20,363,423,191.92
  5. Step 5: Solve for x
    x = 20,363,423,191.92/166,138.20
  6. Step 6: Final answer
    x = 122,569.18

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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.