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Finding the Fourth Proportional to 71,160.73, 106,740.96 and 66,830.47

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Solution

The fourth proportional to 71,160.73, 106,740.96 and 66,830.47 is: 100,245.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,160.73 : 106,740.96 = 66,830.47 : x
  2. Step 2: Convert to fraction form
    71,160.73/106,740.96 = 66,830.47/x
  3. Step 3: Cross multiply
    71,160.73x = 106,740.96 × 66,830.47
  4. Step 4: Simplify right side
    71,160.73x = 7,133,548,525.05
  5. Step 5: Solve for x
    x = 7,133,548,525.05/71,160.73
  6. Step 6: Final answer
    x = 100,245.58

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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.