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Finding the Fourth Proportional to 105,966.48, 158,801.88 and 79,640.40

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Solution

The fourth proportional to 105,966.48, 158,801.88 and 79,640.40 is: 119,349.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,966.48 : 158,801.88 = 79,640.40 : x
  2. Step 2: Convert to fraction form
    105,966.48/158,801.88 = 79,640.40/x
  3. Step 3: Cross multiply
    105,966.48x = 158,801.88 × 79,640.40
  4. Step 4: Simplify right side
    105,966.48x = 12,647,045,243.95
  5. Step 5: Solve for x
    x = 12,647,045,243.95/105,966.48
  6. Step 6: Final answer
    x = 119,349.49

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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.