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Finding the Fourth Proportional to 122,310.72, 168,771.52 and 71,338.88

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Solution

The fourth proportional to 122,310.72, 168,771.52 and 71,338.88 is: 98,437.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,310.72 : 168,771.52 = 71,338.88 : x
  2. Step 2: Convert to fraction form
    122,310.72/168,771.52 = 71,338.88/x
  3. Step 3: Cross multiply
    122,310.72x = 168,771.52 × 71,338.88
  4. Step 4: Simplify right side
    122,310.72x = 12,039,971,212.70
  5. Step 5: Solve for x
    x = 12,039,971,212.70/122,310.72
  6. Step 6: Final answer
    x = 98,437.58

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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.