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Finding the Fourth Proportional to 135,903.70, 203,855.55 and 123,437.80

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Solution

The fourth proportional to 135,903.70, 203,855.55 and 123,437.80 is: 185,156.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,903.70 : 203,855.55 = 123,437.80 : x
  2. Step 2: Convert to fraction form
    135,903.70/203,855.55 = 123,437.80/x
  3. Step 3: Cross multiply
    135,903.70x = 203,855.55 × 123,437.80
  4. Step 4: Simplify right side
    135,903.70x = 25,163,480,609.79
  5. Step 5: Solve for x
    x = 25,163,480,609.79/135,903.70
  6. Step 6: Final answer
    x = 185,156.70

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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.