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Finding the Fourth Proportional to 251,649, 377,531.82 and 85,437

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Solution

The fourth proportional to 251,649, 377,531.82 and 85,437 is: 128,175.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    251,649 : 377,531.82 = 85,437 : x
  2. Step 2: Convert to fraction form
    251,649/377,531.82 = 85,437/x
  3. Step 3: Cross multiply
    251,649x = 377,531.82 × 85,437
  4. Step 4: Simplify right side
    251,649x = 32,255,186,105.34
  5. Step 5: Solve for x
    x = 32,255,186,105.34/251,649
  6. Step 6: Final answer
    x = 128,175.30

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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.