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Finding the Fourth Proportional to 144,340.43, 216,706.98 and 81,204.98

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Solution

The fourth proportional to 144,340.43, 216,706.98 and 81,204.98 is: 121,917.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    144,340.43 : 216,706.98 = 81,204.98 : x
  2. Step 2: Convert to fraction form
    144,340.43/216,706.98 = 81,204.98/x
  3. Step 3: Cross multiply
    144,340.43x = 216,706.98 × 81,204.98
  4. Step 4: Simplify right side
    144,340.43x = 17,597,685,976.76
  5. Step 5: Solve for x
    x = 17,597,685,976.76/144,340.43
  6. Step 6: Final answer
    x = 121,917.93

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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.