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Finding the Fourth Proportional to 308,082.45, 425,111.70 and 172,099.59

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Solution

The fourth proportional to 308,082.45, 425,111.70 and 172,099.59 is: 237,473.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,082.45 : 425,111.70 = 172,099.59 : x
  2. Step 2: Convert to fraction form
    308,082.45/425,111.70 = 172,099.59/x
  3. Step 3: Cross multiply
    308,082.45x = 425,111.70 × 172,099.59
  4. Step 4: Simplify right side
    308,082.45x = 73,161,549,274.20
  5. Step 5: Solve for x
    x = 73,161,549,274.20/308,082.45
  6. Step 6: Final answer
    x = 237,473.93

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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.