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Finding the Fourth Proportional to 122,136.75, 168,558.48 and 71,845.47

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Solution

The fourth proportional to 122,136.75, 168,558.48 and 71,845.47 is: 99,152.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,136.75 : 168,558.48 = 71,845.47 : x
  2. Step 2: Convert to fraction form
    122,136.75/168,558.48 = 71,845.47/x
  3. Step 3: Cross multiply
    122,136.75x = 168,558.48 × 71,845.47
  4. Step 4: Simplify right side
    122,136.75x = 12,110,163,218.09
  5. Step 5: Solve for x
    x = 12,110,163,218.09/122,136.75
  6. Step 6: Final answer
    x = 99,152.49

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.