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Finding the Fourth Proportional to 144,674.52, 216,805 and 81,361.76

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Solution

The fourth proportional to 144,674.52, 216,805 and 81,361.76 is: 121,926.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    144,674.52 : 216,805 = 81,361.76 : x
  2. Step 2: Convert to fraction form
    144,674.52/216,805 = 81,361.76/x
  3. Step 3: Cross multiply
    144,674.52x = 216,805 × 81,361.76
  4. Step 4: Simplify right side
    144,674.52x = 17,639,636,376.80
  5. Step 5: Solve for x
    x = 17,639,636,376.80/144,674.52
  6. Step 6: Final answer
    x = 121,926.35

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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.