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Finding the Fourth Proportional to 144,339.43, 216,705.48 and 81,203.98

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Solution

The fourth proportional to 144,339.43, 216,705.48 and 81,203.98 is: 121,916.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    144,339.43 : 216,705.48 = 81,203.98 : x
  2. Step 2: Convert to fraction form
    144,339.43/216,705.48 = 81,203.98/x
  3. Step 3: Cross multiply
    144,339.43x = 216,705.48 × 81,203.98
  4. Step 4: Simplify right side
    144,339.43x = 17,597,346,922.05
  5. Step 5: Solve for x
    x = 17,597,346,922.05/144,339.43
  6. Step 6: Final answer
    x = 121,916.42

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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.