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Finding the Fourth Proportional to 118,755.15, 163,877.70 and 65,040.61

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Solution

The fourth proportional to 118,755.15, 163,877.70 and 65,040.61 is: 89,753.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,755.15 : 163,877.70 = 65,040.61 : x
  2. Step 2: Convert to fraction form
    118,755.15/163,877.70 = 65,040.61/x
  3. Step 3: Cross multiply
    118,755.15x = 163,877.70 × 65,040.61
  4. Step 4: Simplify right side
    118,755.15x = 10,658,705,573.40
  5. Step 5: Solve for x
    x = 10,658,705,573.40/118,755.15
  6. Step 6: Final answer
    x = 89,753.63

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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.