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Finding the Fourth Proportional to 251,685, 347,325.35 and 138,507.75

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Solution

The fourth proportional to 251,685, 347,325.35 and 138,507.75 is: 191,140.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    251,685 : 347,325.35 = 138,507.75 : x
  2. Step 2: Convert to fraction form
    251,685/347,325.35 = 138,507.75/x
  3. Step 3: Cross multiply
    251,685x = 347,325.35 × 138,507.75
  4. Step 4: Simplify right side
    251,685x = 48,107,252,053.92
  5. Step 5: Solve for x
    x = 48,107,252,053.92/251,685
  6. Step 6: Final answer
    x = 191,140.72

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.