Home / 145,040.88-200,156.22-81,384.60

Finding the Fourth Proportional to 145,040.88, 200,156.22 and 81,384.60

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Solution

The fourth proportional to 145,040.88, 200,156.22 and 81,384.60 is: 112,310.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,040.88 : 200,156.22 = 81,384.60 : x
  2. Step 2: Convert to fraction form
    145,040.88/200,156.22 = 81,384.60/x
  3. Step 3: Cross multiply
    145,040.88x = 200,156.22 × 81,384.60
  4. Step 4: Simplify right side
    145,040.88x = 16,289,633,902.21
  5. Step 5: Solve for x
    x = 16,289,633,902.21/145,040.88
  6. Step 6: Final answer
    x = 112,310.64

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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.