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Finding the Fourth Proportional to 193,430.86, 290,052.96 and 81,080.90

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Solution

The fourth proportional to 193,430.86, 290,052.96 and 81,080.90 is: 121,582.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    193,430.86 : 290,052.96 = 81,080.90 : x
  2. Step 2: Convert to fraction form
    193,430.86/290,052.96 = 81,080.90/x
  3. Step 3: Cross multiply
    193,430.86x = 290,052.96 × 81,080.90
  4. Step 4: Simplify right side
    193,430.86x = 23,517,755,044.46
  5. Step 5: Solve for x
    x = 23,517,755,044.46/193,430.86
  6. Step 6: Final answer
    x = 121,582.23

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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.