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Finding the Fourth Proportional to 122,772.66, 184,158.99 and 81,209.94

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Solution

The fourth proportional to 122,772.66, 184,158.99 and 81,209.94 is: 121,814.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,772.66 : 184,158.99 = 81,209.94 : x
  2. Step 2: Convert to fraction form
    122,772.66/184,158.99 = 81,209.94/x
  3. Step 3: Cross multiply
    122,772.66x = 184,158.99 × 81,209.94
  4. Step 4: Simplify right side
    122,772.66x = 14,955,540,528.36
  5. Step 5: Solve for x
    x = 14,955,540,528.36/122,772.66
  6. Step 6: Final answer
    x = 121,814.91

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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.