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Finding the Fourth Proportional to 71,751.59, 99,021.93 and 39,920.56

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Solution

The fourth proportional to 71,751.59, 99,021.93 and 39,920.56 is: 55,093.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,751.59 : 99,021.93 = 39,920.56 : x
  2. Step 2: Convert to fraction form
    71,751.59/99,021.93 = 39,920.56/x
  3. Step 3: Cross multiply
    71,751.59x = 99,021.93 × 39,920.56
  4. Step 4: Simplify right side
    71,751.59x = 3,953,010,500.62
  5. Step 5: Solve for x
    x = 3,953,010,500.62/71,751.59
  6. Step 6: Final answer
    x = 55,093.00

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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.