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Finding the Fourth Proportional to 250,716.45, 375,721.08 and 138,447.21

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Solution

The fourth proportional to 250,716.45, 375,721.08 and 138,447.21 is: 207,475.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    250,716.45 : 375,721.08 = 138,447.21 : x
  2. Step 2: Convert to fraction form
    250,716.45/375,721.08 = 138,447.21/x
  3. Step 3: Cross multiply
    250,716.45x = 375,721.08 × 138,447.21
  4. Step 4: Simplify right side
    250,716.45x = 52,017,535,264.19
  5. Step 5: Solve for x
    x = 52,017,535,264.19/250,716.45
  6. Step 6: Final answer
    x = 207,475.56

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.