Home / 71,917.97-99,242.70-40,085.78

Finding the Fourth Proportional to 71,917.97, 99,242.70 and 40,085.78

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Solution

The fourth proportional to 71,917.97, 99,242.70 and 40,085.78 is: 55,316.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,917.97 : 99,242.70 = 40,085.78 : x
  2. Step 2: Convert to fraction form
    71,917.97/99,242.70 = 40,085.78/x
  3. Step 3: Cross multiply
    71,917.97x = 99,242.70 × 40,085.78
  4. Step 4: Simplify right side
    71,917.97x = 3,978,221,038.81
  5. Step 5: Solve for x
    x = 3,978,221,038.81/71,917.97
  6. Step 6: Final answer
    x = 55,316.09

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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.