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Finding the Fourth Proportional to 133,217.84, 183,838.44 and 72,787.19

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Solution

The fourth proportional to 133,217.84, 183,838.44 and 72,787.19 is: 100,445.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    133,217.84 : 183,838.44 = 72,787.19 : x
  2. Step 2: Convert to fraction form
    133,217.84/183,838.44 = 72,787.19/x
  3. Step 3: Cross multiply
    133,217.84x = 183,838.44 × 72,787.19
  4. Step 4: Simplify right side
    133,217.84x = 13,381,083,461.58
  5. Step 5: Solve for x
    x = 13,381,083,461.58/133,217.84
  6. Step 6: Final answer
    x = 100,445.13

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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.