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Finding the Fourth Proportional to 99,440.91, 149,161.37 and 81,873.83

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Solution

The fourth proportional to 99,440.91, 149,161.37 and 81,873.83 is: 122,810.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,440.91 : 149,161.37 = 81,873.83 : x
  2. Step 2: Convert to fraction form
    99,440.91/149,161.37 = 81,873.83/x
  3. Step 3: Cross multiply
    99,440.91x = 149,161.37 × 81,873.83
  4. Step 4: Simplify right side
    99,440.91x = 12,212,411,494.77
  5. Step 5: Solve for x
    x = 12,212,411,494.77/99,440.91
  6. Step 6: Final answer
    x = 122,810.74

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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.