Home / 99,630.03-149,278.95-81,915.33

Finding the Fourth Proportional to 99,630.03, 149,278.95 and 81,915.33

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Solution

The fourth proportional to 99,630.03, 149,278.95 and 81,915.33 is: 122,736.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,630.03 : 149,278.95 = 81,915.33 : x
  2. Step 2: Convert to fraction form
    99,630.03/149,278.95 = 81,915.33/x
  3. Step 3: Cross multiply
    99,630.03x = 149,278.95 × 81,915.33
  4. Step 4: Simplify right side
    99,630.03x = 12,228,234,451.30
  5. Step 5: Solve for x
    x = 12,228,234,451.30/99,630.03
  6. Step 6: Final answer
    x = 122,736.43

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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.