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Finding the Fourth Proportional to 251,949.65, 347,690.49 and 138,772.40

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Solution

The fourth proportional to 251,949.65, 347,690.49 and 138,772.40 is: 191,505.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    251,949.65 : 347,690.49 = 138,772.40 : x
  2. Step 2: Convert to fraction form
    251,949.65/347,690.49 = 138,772.40/x
  3. Step 3: Cross multiply
    251,949.65x = 347,690.49 × 138,772.40
  4. Step 4: Simplify right side
    251,949.65x = 48,249,842,016.02
  5. Step 5: Solve for x
    x = 48,249,842,016.02/251,949.65
  6. Step 6: Final answer
    x = 191,505.89

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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.