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Finding the Fourth Proportional to 402,125.40, 603,168.90 and 135,859.80

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Solution

The fourth proportional to 402,125.40, 603,168.90 and 135,859.80 is: 203,783.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,125.40 : 603,168.90 = 135,859.80 : x
  2. Step 2: Convert to fraction form
    402,125.40/603,168.90 = 135,859.80/x
  3. Step 3: Cross multiply
    402,125.40x = 603,168.90 × 135,859.80
  4. Step 4: Simplify right side
    402,125.40x = 81,946,406,120.22
  5. Step 5: Solve for x
    x = 81,946,406,120.22/402,125.40
  6. Step 6: Final answer
    x = 203,783.21

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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.