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Finding the Fourth Proportional to 121,834.91, 182,468.50 and 118,471.79

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Solution

The fourth proportional to 121,834.91, 182,468.50 and 118,471.79 is: 177,431.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,834.91 : 182,468.50 = 118,471.79 : x
  2. Step 2: Convert to fraction form
    121,834.91/182,468.50 = 118,471.79/x
  3. Step 3: Cross multiply
    121,834.91x = 182,468.50 × 118,471.79
  4. Step 4: Simplify right side
    121,834.91x = 21,617,369,813.62
  5. Step 5: Solve for x
    x = 21,617,369,813.62/121,834.91
  6. Step 6: Final answer
    x = 177,431.66

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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.