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Finding the Fourth Proportional to 308,121.04, 425,165 and 172,138.32

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Solution

The fourth proportional to 308,121.04, 425,165 and 172,138.32 is: 237,527.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,121.04 : 425,165 = 172,138.32 : x
  2. Step 2: Convert to fraction form
    308,121.04/425,165 = 172,138.32/x
  3. Step 3: Cross multiply
    308,121.04x = 425,165 × 172,138.32
  4. Step 4: Simplify right side
    308,121.04x = 73,187,188,822.80
  5. Step 5: Solve for x
    x = 73,187,188,822.80/308,121.04
  6. Step 6: Final answer
    x = 237,527.40

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1.5x scale

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.