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Finding the Fourth Proportional to 118,279.71, 163,220.31 and 67,287.65

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Solution

The fourth proportional to 118,279.71, 163,220.31 and 67,287.65 is: 92,853.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,279.71 : 163,220.31 = 67,287.65 : x
  2. Step 2: Convert to fraction form
    118,279.71/163,220.31 = 67,287.65/x
  3. Step 3: Cross multiply
    118,279.71x = 163,220.31 × 67,287.65
  4. Step 4: Simplify right side
    118,279.71x = 10,982,710,276.07
  5. Step 5: Solve for x
    x = 10,982,710,276.07/118,279.71
  6. Step 6: Final answer
    x = 92,853.71

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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.