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Finding the Fourth Proportional to 308,082.64, 425,154 and 172,116.64

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Solution

The fourth proportional to 308,082.64, 425,154 and 172,116.64 is: 237,520.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,082.64 : 425,154 = 172,116.64 : x
  2. Step 2: Convert to fraction form
    308,082.64/425,154 = 172,116.64/x
  3. Step 3: Cross multiply
    308,082.64x = 425,154 × 172,116.64
  4. Step 4: Simplify right side
    308,082.64x = 73,176,077,962.56
  5. Step 5: Solve for x
    x = 73,176,077,962.56/308,082.64
  6. Step 6: Final answer
    x = 237,520.94

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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.