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Finding the Fourth Proportional to 118,757.12, 163,881.78 and 65,044.40

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Solution

The fourth proportional to 118,757.12, 163,881.78 and 65,044.40 is: 89,759.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,757.12 : 163,881.78 = 65,044.40 : x
  2. Step 2: Convert to fraction form
    118,757.12/163,881.78 = 65,044.40/x
  3. Step 3: Cross multiply
    118,757.12x = 163,881.78 × 65,044.40
  4. Step 4: Simplify right side
    118,757.12x = 10,659,592,051.03
  5. Step 5: Solve for x
    x = 10,659,592,051.03/118,757.12
  6. Step 6: Final answer
    x = 89,759.60

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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.