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Finding the Fourth Proportional to 253,179.65, 349,373.78 and 138,435.51

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Solution

The fourth proportional to 253,179.65, 349,373.78 and 138,435.51 is: 191,033.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    253,179.65 : 349,373.78 = 138,435.51 : x
  2. Step 2: Convert to fraction form
    253,179.65/349,373.78 = 138,435.51/x
  3. Step 3: Cross multiply
    253,179.65x = 349,373.78 × 138,435.51
  4. Step 4: Simplify right side
    253,179.65x = 48,365,735,993.54
  5. Step 5: Solve for x
    x = 48,365,735,993.54/253,179.65
  6. Step 6: Final answer
    x = 191,033.27

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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.