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Finding the Fourth Proportional to 318,997.54, 478,570.38 and 108,637.30

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Solution

The fourth proportional to 318,997.54, 478,570.38 and 108,637.30 is: 162,981.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,997.54 : 478,570.38 = 108,637.30 : x
  2. Step 2: Convert to fraction form
    318,997.54/478,570.38 = 108,637.30/x
  3. Step 3: Cross multiply
    318,997.54x = 478,570.38 × 108,637.30
  4. Step 4: Simplify right side
    318,997.54x = 51,990,593,943.17
  5. Step 5: Solve for x
    x = 51,990,593,943.17/318,997.54
  6. Step 6: Final answer
    x = 162,981.18

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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.