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Finding the Fourth Proportional to 121,423.05, 182,079.90 and 54,828.90

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Solution

The fourth proportional to 121,423.05, 182,079.90 and 54,828.90 is: 82,218.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,423.05 : 182,079.90 = 54,828.90 : x
  2. Step 2: Convert to fraction form
    121,423.05/182,079.90 = 54,828.90/x
  3. Step 3: Cross multiply
    121,423.05x = 182,079.90 × 54,828.90
  4. Step 4: Simplify right side
    121,423.05x = 9,983,240,629.11
  5. Step 5: Solve for x
    x = 9,983,240,629.11/121,423.05
  6. Step 6: Final answer
    x = 82,218.66

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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.