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Finding the Fourth Proportional to 308,069.34, 425,120.47 and 172,076.20

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Solution

The fourth proportional to 308,069.34, 425,120.47 and 172,076.20 is: 237,456.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,069.34 : 425,120.47 = 172,076.20 : x
  2. Step 2: Convert to fraction form
    308,069.34/425,120.47 = 172,076.20/x
  3. Step 3: Cross multiply
    308,069.34x = 425,120.47 × 172,076.20
  4. Step 4: Simplify right side
    308,069.34x = 73,153,115,019.81
  5. Step 5: Solve for x
    x = 73,153,115,019.81/308,069.34
  6. Step 6: Final answer
    x = 237,456.66

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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.