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Finding the Fourth Proportional to 251,190, 346,644.72 and 138,015.18

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Solution

The fourth proportional to 251,190, 346,644.72 and 138,015.18 is: 190,462.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    251,190 : 346,644.72 = 138,015.18 : x
  2. Step 2: Convert to fraction form
    251,190/346,644.72 = 138,015.18/x
  3. Step 3: Cross multiply
    251,190x = 346,644.72 × 138,015.18
  4. Step 4: Simplify right side
    251,190x = 47,842,233,426.85
  5. Step 5: Solve for x
    x = 47,842,233,426.85/251,190
  6. Step 6: Final answer
    x = 190,462.33

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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.