Home / 81,989.21-122,854.28-61,903.64

Finding the Fourth Proportional to 81,989.21, 122,854.28 and 61,903.64

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Solution

The fourth proportional to 81,989.21, 122,854.28 and 61,903.64 is: 92,757.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,989.21 : 122,854.28 = 61,903.64 : x
  2. Step 2: Convert to fraction form
    81,989.21/122,854.28 = 61,903.64/x
  3. Step 3: Cross multiply
    81,989.21x = 122,854.28 × 61,903.64
  4. Step 4: Simplify right side
    81,989.21x = 7,605,126,197.79
  5. Step 5: Solve for x
    x = 7,605,126,197.79/81,989.21
  6. Step 6: Final answer
    x = 92,757.65

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.