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Finding the Fourth Proportional to 144,340.62, 216,707.26 and 81,205.16

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Solution

The fourth proportional to 144,340.62, 216,707.26 and 81,205.16 is: 121,918.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    144,340.62 : 216,707.26 = 81,205.16 : x
  2. Step 2: Convert to fraction form
    144,340.62/216,707.26 = 81,205.16/x
  3. Step 3: Cross multiply
    144,340.62x = 216,707.26 × 81,205.16
  4. Step 4: Simplify right side
    144,340.62x = 17,597,747,721.46
  5. Step 5: Solve for x
    x = 17,597,747,721.46/144,340.62
  6. Step 6: Final answer
    x = 121,918.19

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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.