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Finding the Fourth Proportional to 135,103.55, 202,665.85 and 78,949.49

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Solution

The fourth proportional to 135,103.55, 202,665.85 and 78,949.49 is: 118,430.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,103.55 : 202,665.85 = 78,949.49 : x
  2. Step 2: Convert to fraction form
    135,103.55/202,665.85 = 78,949.49/x
  3. Step 3: Cross multiply
    135,103.55x = 202,665.85 × 78,949.49
  4. Step 4: Simplify right side
    135,103.55x = 16,000,364,287.21
  5. Step 5: Solve for x
    x = 16,000,364,287.21/135,103.55
  6. Step 6: Final answer
    x = 118,430.38

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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.