Home / 71,945.89-99,281.68-40,108.63

Finding the Fourth Proportional to 71,945.89, 99,281.68 and 40,108.63

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Solution

The fourth proportional to 71,945.89, 99,281.68 and 40,108.63 is: 55,347.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,945.89 : 99,281.68 = 40,108.63 : x
  2. Step 2: Convert to fraction form
    71,945.89/99,281.68 = 40,108.63/x
  3. Step 3: Cross multiply
    71,945.89x = 99,281.68 × 40,108.63
  4. Step 4: Simplify right side
    71,945.89x = 3,982,052,168.90
  5. Step 5: Solve for x
    x = 3,982,052,168.90/71,945.89
  6. Step 6: Final answer
    x = 55,347.88

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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.