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Finding the Fourth Proportional to 71,135.42, 106,814.09 and 67,980.47

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Solution

The fourth proportional to 71,135.42, 106,814.09 and 67,980.47 is: 102,076.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,135.42 : 106,814.09 = 67,980.47 : x
  2. Step 2: Convert to fraction form
    71,135.42/106,814.09 = 67,980.47/x
  3. Step 3: Cross multiply
    71,135.42x = 106,814.09 × 67,980.47
  4. Step 4: Simplify right side
    71,135.42x = 7,261,271,676.70
  5. Step 5: Solve for x
    x = 7,261,271,676.70/71,135.42
  6. Step 6: Final answer
    x = 102,076.75

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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.