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Finding the Fourth Proportional to 99,440.53, 149,160.80 and 81,873.45

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Solution

The fourth proportional to 99,440.53, 149,160.80 and 81,873.45 is: 122,810.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,440.53 : 149,160.80 = 81,873.45 : x
  2. Step 2: Convert to fraction form
    99,440.53/149,160.80 = 81,873.45/x
  3. Step 3: Cross multiply
    99,440.53x = 149,160.80 × 81,873.45
  4. Step 4: Simplify right side
    99,440.53x = 12,212,309,505.44
  5. Step 5: Solve for x
    x = 12,212,309,505.44/99,440.53
  6. Step 6: Final answer
    x = 122,810.18

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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.