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Finding the Fourth Proportional to 85,166.20, 127,749.30 and 83,416.60

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Solution

The fourth proportional to 85,166.20, 127,749.30 and 83,416.60 is: 125,124.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,166.20 : 127,749.30 = 83,416.60 : x
  2. Step 2: Convert to fraction form
    85,166.20/127,749.30 = 83,416.60/x
  3. Step 3: Cross multiply
    85,166.20x = 127,749.30 × 83,416.60
  4. Step 4: Simplify right side
    85,166.20x = 10,656,412,258.38
  5. Step 5: Solve for x
    x = 10,656,412,258.38/85,166.20
  6. Step 6: Final answer
    x = 125,124.90

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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.