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Finding the Fourth Proportional to 308,023.72, 425,074.21 and 172,063.40

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Solution

The fourth proportional to 308,023.72, 425,074.21 and 172,063.40 is: 237,448.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,023.72 : 425,074.21 = 172,063.40 : x
  2. Step 2: Convert to fraction form
    308,023.72/425,074.21 = 172,063.40/x
  3. Step 3: Cross multiply
    308,023.72x = 425,074.21 × 172,063.40
  4. Step 4: Simplify right side
    308,023.72x = 73,139,713,824.91
  5. Step 5: Solve for x
    x = 73,139,713,824.91/308,023.72
  6. Step 6: Final answer
    x = 237,448.32

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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.