Home / 81,840.65-122,161.14-75,829.84

Finding the Fourth Proportional to 81,840.65, 122,161.14 and 75,829.84

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Solution

The fourth proportional to 81,840.65, 122,161.14 and 75,829.84 is: 113,188.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,840.65 : 122,161.14 = 75,829.84 : x
  2. Step 2: Convert to fraction form
    81,840.65/122,161.14 = 75,829.84/x
  3. Step 3: Cross multiply
    81,840.65x = 122,161.14 × 75,829.84
  4. Step 4: Simplify right side
    81,840.65x = 9,263,459,395.01
  5. Step 5: Solve for x
    x = 9,263,459,395.01/81,840.65
  6. Step 6: Final answer
    x = 113,188.98

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.