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Finding the Fourth Proportional to 230,143.80, 345,215.70 and 72,420.60

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Solution

The fourth proportional to 230,143.80, 345,215.70 and 72,420.60 is: 108,630.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    230,143.80 : 345,215.70 = 72,420.60 : x
  2. Step 2: Convert to fraction form
    230,143.80/345,215.70 = 72,420.60/x
  3. Step 3: Cross multiply
    230,143.80x = 345,215.70 × 72,420.60
  4. Step 4: Simplify right side
    230,143.80x = 25,000,728,123.42
  5. Step 5: Solve for x
    x = 25,000,728,123.42/230,143.80
  6. Step 6: Final answer
    x = 108,630.90

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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.