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Finding the Fourth Proportional to 132,920.82, 183,428.46 and 72,491.94

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Solution

The fourth proportional to 132,920.82, 183,428.46 and 72,491.94 is: 100,037.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    132,920.82 : 183,428.46 = 72,491.94 : x
  2. Step 2: Convert to fraction form
    132,920.82/183,428.46 = 72,491.94/x
  3. Step 3: Cross multiply
    132,920.82x = 183,428.46 × 72,491.94
  4. Step 4: Simplify right side
    132,920.82x = 13,297,084,916.61
  5. Step 5: Solve for x
    x = 13,297,084,916.61/132,920.82
  6. Step 6: Final answer
    x = 100,037.64

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.