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Finding the Fourth Proportional to 307,687.68, 424,608.08 and 171,720.14

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Solution

The fourth proportional to 307,687.68, 424,608.08 and 171,720.14 is: 236,973.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    307,687.68 : 424,608.08 = 171,720.14 : x
  2. Step 2: Convert to fraction form
    307,687.68/424,608.08 = 171,720.14/x
  3. Step 3: Cross multiply
    307,687.68x = 424,608.08 × 171,720.14
  4. Step 4: Simplify right side
    307,687.68x = 72,913,755,961.09
  5. Step 5: Solve for x
    x = 72,913,755,961.09/307,687.68
  6. Step 6: Final answer
    x = 236,973.27

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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.