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Finding the Fourth Proportional to 118,763.76, 163,780.88 and 71,009.36

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Solution

The fourth proportional to 118,763.76, 163,780.88 and 71,009.36 is: 97,925.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,763.76 : 163,780.88 = 71,009.36 : x
  2. Step 2: Convert to fraction form
    118,763.76/163,780.88 = 71,009.36/x
  3. Step 3: Cross multiply
    118,763.76x = 163,780.88 × 71,009.36
  4. Step 4: Simplify right side
    118,763.76x = 11,629,975,469.04
  5. Step 5: Solve for x
    x = 11,629,975,469.04/118,763.76
  6. Step 6: Final answer
    x = 97,925.29

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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.