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Finding the Fourth Proportional to 387,981.98, 581,997.56 and 121,753

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Solution

The fourth proportional to 387,981.98, 581,997.56 and 121,753 is: 182,637.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,981.98 : 581,997.56 = 121,753 : x
  2. Step 2: Convert to fraction form
    387,981.98/581,997.56 = 121,753/x
  3. Step 3: Cross multiply
    387,981.98x = 581,997.56 × 121,753
  4. Step 4: Simplify right side
    387,981.98x = 70,859,948,922.68
  5. Step 5: Solve for x
    x = 70,859,948,922.68/387,981.98
  6. Step 6: Final answer
    x = 182,637.22

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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.