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Finding the Fourth Proportional to 118,793.55, 163,938.03 and 65,078.70

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Solution

The fourth proportional to 118,793.55, 163,938.03 and 65,078.70 is: 89,810.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,793.55 : 163,938.03 = 65,078.70 : x
  2. Step 2: Convert to fraction form
    118,793.55/163,938.03 = 65,078.70/x
  3. Step 3: Cross multiply
    118,793.55x = 163,938.03 × 65,078.70
  4. Step 4: Simplify right side
    118,793.55x = 10,668,873,872.96
  5. Step 5: Solve for x
    x = 10,668,873,872.96/118,793.55
  6. Step 6: Final answer
    x = 89,810.21

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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.