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Finding the Fourth Proportional to 76,658.60, 105,787.74 and 43,124.60

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Solution

The fourth proportional to 76,658.60, 105,787.74 and 43,124.60 is: 59,511.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,658.60 : 105,787.74 = 43,124.60 : x
  2. Step 2: Convert to fraction form
    76,658.60/105,787.74 = 43,124.60/x
  3. Step 3: Cross multiply
    76,658.60x = 105,787.74 × 43,124.60
  4. Step 4: Simplify right side
    76,658.60x = 4,562,053,972.40
  5. Step 5: Solve for x
    x = 4,562,053,972.40/76,658.60
  6. Step 6: Final answer
    x = 59,511.31

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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.