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Finding the Fourth Proportional to 78,092.48, 117,200.68 and 40,663.20

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Solution

The fourth proportional to 78,092.48, 117,200.68 and 40,663.20 is: 61,027.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,092.48 : 117,200.68 = 40,663.20 : x
  2. Step 2: Convert to fraction form
    78,092.48/117,200.68 = 40,663.20/x
  3. Step 3: Cross multiply
    78,092.48x = 117,200.68 × 40,663.20
  4. Step 4: Simplify right side
    78,092.48x = 4,765,754,690.98
  5. Step 5: Solve for x
    x = 4,765,754,690.98/78,092.48
  6. Step 6: Final answer
    x = 61,027.06

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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.