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Finding the Fourth Proportional to 78,061.80, 117,092.99 and 18,897.37

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Solution

The fourth proportional to 78,061.80, 117,092.99 and 18,897.37 is: 28,346.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,061.80 : 117,092.99 = 18,897.37 : x
  2. Step 2: Convert to fraction form
    78,061.80/117,092.99 = 18,897.37/x
  3. Step 3: Cross multiply
    78,061.80x = 117,092.99 × 18,897.37
  4. Step 4: Simplify right side
    78,061.80x = 2,212,749,556.44
  5. Step 5: Solve for x
    x = 2,212,749,556.44/78,061.80
  6. Step 6: Final answer
    x = 28,346.13

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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.