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Finding the Fourth Proportional to 251,651, 377,534.82 and 85,439

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Solution

The fourth proportional to 251,651, 377,534.82 and 85,439 is: 128,178.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    251,651 : 377,534.82 = 85,439 : x
  2. Step 2: Convert to fraction form
    251,651/377,534.82 = 85,439/x
  3. Step 3: Cross multiply
    251,651x = 377,534.82 × 85,439
  4. Step 4: Simplify right side
    251,651x = 32,256,197,485.98
  5. Step 5: Solve for x
    x = 32,256,197,485.98/251,651
  6. Step 6: Final answer
    x = 128,178.30

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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.