Home / 81,131.45-111,888.65-67,564.41

Finding the Fourth Proportional to 81,131.45, 111,888.65 and 67,564.41

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Solution

The fourth proportional to 81,131.45, 111,888.65 and 67,564.41 is: 93,178.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,131.45 : 111,888.65 = 67,564.41 : x
  2. Step 2: Convert to fraction form
    81,131.45/111,888.65 = 67,564.41/x
  3. Step 3: Cross multiply
    81,131.45x = 111,888.65 × 67,564.41
  4. Step 4: Simplify right side
    81,131.45x = 7,559,690,285.12
  5. Step 5: Solve for x
    x = 7,559,690,285.12/81,131.45
  6. Step 6: Final answer
    x = 93,178.30

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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.