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Finding the Fourth Proportional to 168,876,297.42, 253,478,251.80 and 81,499,305.30

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Solution

The fourth proportional to 168,876,297.42, 253,478,251.80 and 81,499,305.30 is: 122,328,010.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    168,876,297.42 : 253,478,251.80 = 81,499,305.30 : x
  2. Step 2: Convert to fraction form
    168,876,297.42/253,478,251.80 = 81,499,305.30/x
  3. Step 3: Cross multiply
    168,876,297.42x = 253,478,251.80 × 81,499,305.30
  4. Step 4: Simplify right side
    168,876,297.42x = 20,658,301,430,358,476
  5. Step 5: Solve for x
    x = 20,658,301,430,358,476/168,876,297.42
  6. Step 6: Final answer
    x = 122,328,010.18

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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.