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Finding the Fourth Proportional to 71,740.85, 99,001.89 and 39,477.43

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Solution

The fourth proportional to 71,740.85, 99,001.89 and 39,477.43 is: 54,478.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,740.85 : 99,001.89 = 39,477.43 : x
  2. Step 2: Convert to fraction form
    71,740.85/99,001.89 = 39,477.43/x
  3. Step 3: Cross multiply
    71,740.85x = 99,001.89 × 39,477.43
  4. Step 4: Simplify right side
    71,740.85x = 3,908,339,934.84
  5. Step 5: Solve for x
    x = 3,908,339,934.84/71,740.85
  6. Step 6: Final answer
    x = 54,478.59

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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.