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Finding the Fourth Proportional to 251,871.10, 347,597.93 and 138,693.85

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Solution

The fourth proportional to 251,871.10, 347,597.93 and 138,693.85 is: 191,406.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    251,871.10 : 347,597.93 = 138,693.85 : x
  2. Step 2: Convert to fraction form
    251,871.10/347,597.93 = 138,693.85/x
  3. Step 3: Cross multiply
    251,871.10x = 347,597.93 × 138,693.85
  4. Step 4: Simplify right side
    251,871.10x = 48,209,695,163.73
  5. Step 5: Solve for x
    x = 48,209,695,163.73/251,871.10
  6. Step 6: Final answer
    x = 191,406.22

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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.