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Finding the Fourth Proportional to 164,136.70, 246,213.15 and 85,404.70

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Solution

The fourth proportional to 164,136.70, 246,213.15 and 85,404.70 is: 128,111.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    164,136.70 : 246,213.15 = 85,404.70 : x
  2. Step 2: Convert to fraction form
    164,136.70/246,213.15 = 85,404.70/x
  3. Step 3: Cross multiply
    164,136.70x = 246,213.15 × 85,404.70
  4. Step 4: Simplify right side
    164,136.70x = 21,027,760,211.81
  5. Step 5: Solve for x
    x = 21,027,760,211.81/164,136.70
  6. Step 6: Final answer
    x = 128,111.26

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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.