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Finding the Fourth Proportional to 71,787.44, 99,153.72 and 52,639.58

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Solution

The fourth proportional to 71,787.44, 99,153.72 and 52,639.58 is: 72,706.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,787.44 : 99,153.72 = 52,639.58 : x
  2. Step 2: Convert to fraction form
    71,787.44/99,153.72 = 52,639.58/x
  3. Step 3: Cross multiply
    71,787.44x = 99,153.72 × 52,639.58
  4. Step 4: Simplify right side
    71,787.44x = 5,219,409,680.47
  5. Step 5: Solve for x
    x = 5,219,409,680.47/71,787.44
  6. Step 6: Final answer
    x = 72,706.45

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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.