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Finding the Fourth Proportional to 402,124.90, 603,168.15 and 135,859.30

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Solution

The fourth proportional to 402,124.90, 603,168.15 and 135,859.30 is: 203,782.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,124.90 : 603,168.15 = 135,859.30 : x
  2. Step 2: Convert to fraction form
    402,124.90/603,168.15 = 135,859.30/x
  3. Step 3: Cross multiply
    402,124.90x = 603,168.15 × 135,859.30
  4. Step 4: Simplify right side
    402,124.90x = 81,946,002,641.30
  5. Step 5: Solve for x
    x = 81,946,002,641.30/402,124.90
  6. Step 6: Final answer
    x = 203,782.46

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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.