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Finding the Fourth Proportional to 118,841.80, 164,001.68 and 65,128.06

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Solution

The fourth proportional to 118,841.80, 164,001.68 and 65,128.06 is: 89,876.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,841.80 : 164,001.68 = 65,128.06 : x
  2. Step 2: Convert to fraction form
    118,841.80/164,001.68 = 65,128.06/x
  3. Step 3: Cross multiply
    118,841.80x = 164,001.68 × 65,128.06
  4. Step 4: Simplify right side
    118,841.80x = 10,681,110,822.57
  5. Step 5: Solve for x
    x = 10,681,110,822.57/118,841.80
  6. Step 6: Final answer
    x = 89,876.72

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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.