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Finding the Fourth Proportional to 210,957.21, 291,261.90 and 124,943.85

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Solution

The fourth proportional to 210,957.21, 291,261.90 and 124,943.85 is: 172,505.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,957.21 : 291,261.90 = 124,943.85 : x
  2. Step 2: Convert to fraction form
    210,957.21/291,261.90 = 124,943.85/x
  3. Step 3: Cross multiply
    210,957.21x = 291,261.90 × 124,943.85
  4. Step 4: Simplify right side
    210,957.21x = 36,391,383,144.32
  5. Step 5: Solve for x
    x = 36,391,383,144.32/210,957.21
  6. Step 6: Final answer
    x = 172,505.99

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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.