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Finding the Fourth Proportional to 135,640.30, 203,479.65 and 42,136.30

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Solution

The fourth proportional to 135,640.30, 203,479.65 and 42,136.30 is: 63,210.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,640.30 : 203,479.65 = 42,136.30 : x
  2. Step 2: Convert to fraction form
    135,640.30/203,479.65 = 42,136.30/x
  3. Step 3: Cross multiply
    135,640.30x = 203,479.65 × 42,136.30
  4. Step 4: Simplify right side
    135,640.30x = 8,573,879,576.30
  5. Step 5: Solve for x
    x = 8,573,879,576.30/135,640.30
  6. Step 6: Final answer
    x = 63,210.41

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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.