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Finding the Fourth Proportional to 144,339.22, 216,705.17 and 81,203.77

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Solution

The fourth proportional to 144,339.22, 216,705.17 and 81,203.77 is: 121,916.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    144,339.22 : 216,705.17 = 81,203.77 : x
  2. Step 2: Convert to fraction form
    144,339.22/216,705.17 = 81,203.77/x
  3. Step 3: Cross multiply
    144,339.22x = 216,705.17 × 81,203.77
  4. Step 4: Simplify right side
    144,339.22x = 17,597,277,425.76
  5. Step 5: Solve for x
    x = 17,597,277,425.76/144,339.22
  6. Step 6: Final answer
    x = 121,916.12

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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.