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Finding the Fourth Proportional to 251,645, 377,525.82 and 85,433

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Solution

The fourth proportional to 251,645, 377,525.82 and 85,433 is: 128,169.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    251,645 : 377,525.82 = 85,433 : x
  2. Step 2: Convert to fraction form
    251,645/377,525.82 = 85,433/x
  3. Step 3: Cross multiply
    251,645x = 377,525.82 × 85,433
  4. Step 4: Simplify right side
    251,645x = 32,253,163,380.06
  5. Step 5: Solve for x
    x = 32,253,163,380.06/251,645
  6. Step 6: Final answer
    x = 128,169.30

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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.