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Finding the Fourth Proportional to 251,641, 377,519.82 and 85,429

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Solution

The fourth proportional to 251,641, 377,519.82 and 85,429 is: 128,163.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    251,641 : 377,519.82 = 85,429 : x
  2. Step 2: Convert to fraction form
    251,641/377,519.82 = 85,429/x
  3. Step 3: Cross multiply
    251,641x = 377,519.82 × 85,429
  4. Step 4: Simplify right side
    251,641x = 32,251,140,702.78
  5. Step 5: Solve for x
    x = 32,251,140,702.78/251,641
  6. Step 6: Final answer
    x = 128,163.30

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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.