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Finding the Fourth Proportional to 308,115.83, 425,157.53 and 172,132.90

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Solution

The fourth proportional to 308,115.83, 425,157.53 and 172,132.90 is: 237,519.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,115.83 : 425,157.53 = 172,132.90 : x
  2. Step 2: Convert to fraction form
    308,115.83/425,157.53 = 172,132.90/x
  3. Step 3: Cross multiply
    308,115.83x = 425,157.53 × 172,132.90
  4. Step 4: Simplify right side
    308,115.83x = 73,183,596,672.18
  5. Step 5: Solve for x
    x = 73,183,596,672.18/308,115.83
  6. Step 6: Final answer
    x = 237,519.75

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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.