Home / 145,300.20-218,123.10-82,170.60

Finding the Fourth Proportional to 145,300.20, 218,123.10 and 82,170.60

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Solution

The fourth proportional to 145,300.20, 218,123.10 and 82,170.60 is: 123,353.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,300.20 : 218,123.10 = 82,170.60 : x
  2. Step 2: Convert to fraction form
    145,300.20/218,123.10 = 82,170.60/x
  3. Step 3: Cross multiply
    145,300.20x = 218,123.10 × 82,170.60
  4. Step 4: Simplify right side
    145,300.20x = 17,923,306,000.86
  5. Step 5: Solve for x
    x = 17,923,306,000.86/145,300.20
  6. Step 6: Final answer
    x = 123,353.62

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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.