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Finding the Fourth Proportional to 71,771.58, 99,045.72 and 39,510.09

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Solution

The fourth proportional to 71,771.58, 99,045.72 and 39,510.09 is: 54,524.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,771.58 : 99,045.72 = 39,510.09 : x
  2. Step 2: Convert to fraction form
    71,771.58/99,045.72 = 39,510.09/x
  3. Step 3: Cross multiply
    71,771.58x = 99,045.72 × 39,510.09
  4. Step 4: Simplify right side
    71,771.58x = 3,913,305,311.31
  5. Step 5: Solve for x
    x = 3,913,305,311.31/71,771.58
  6. Step 6: Final answer
    x = 54,524.44

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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.