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Finding the Fourth Proportional to 144,447.70, 216,844.35 and 81,318.10

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Solution

The fourth proportional to 144,447.70, 216,844.35 and 81,318.10 is: 122,074.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    144,447.70 : 216,844.35 = 81,318.10 : x
  2. Step 2: Convert to fraction form
    144,447.70/216,844.35 = 81,318.10/x
  3. Step 3: Cross multiply
    144,447.70x = 216,844.35 × 81,318.10
  4. Step 4: Simplify right side
    144,447.70x = 17,633,370,537.74
  5. Step 5: Solve for x
    x = 17,633,370,537.74/144,447.70
  6. Step 6: Final answer
    x = 122,074.43

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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.