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Finding the Fourth Proportional to 78,897.80, 118,433.10 and 43,905.80

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Solution

The fourth proportional to 78,897.80, 118,433.10 and 43,905.80 is: 65,906.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,897.80 : 118,433.10 = 43,905.80 : x
  2. Step 2: Convert to fraction form
    78,897.80/118,433.10 = 43,905.80/x
  3. Step 3: Cross multiply
    78,897.80x = 118,433.10 × 43,905.80
  4. Step 4: Simplify right side
    78,897.80x = 5,199,900,001.98
  5. Step 5: Solve for x
    x = 5,199,900,001.98/78,897.80
  6. Step 6: Final answer
    x = 65,906.78

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.