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Finding the Fourth Proportional to 118,708.52, 163,817.30 and 67,721.15

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Solution

The fourth proportional to 118,708.52, 163,817.30 and 67,721.15 is: 93,454.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,708.52 : 163,817.30 = 67,721.15 : x
  2. Step 2: Convert to fraction form
    118,708.52/163,817.30 = 67,721.15/x
  3. Step 3: Cross multiply
    118,708.52x = 163,817.30 × 67,721.15
  4. Step 4: Simplify right side
    118,708.52x = 11,093,895,607.29
  5. Step 5: Solve for x
    x = 11,093,895,607.29/118,708.52
  6. Step 6: Final answer
    x = 93,454.92

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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.