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Finding the Fourth Proportional to 308,065.76, 425,126.04 and 172,101.68

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Solution

The fourth proportional to 308,065.76, 425,126.04 and 172,101.68 is: 237,497.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,065.76 : 425,126.04 = 172,101.68 : x
  2. Step 2: Convert to fraction form
    308,065.76/425,126.04 = 172,101.68/x
  3. Step 3: Cross multiply
    308,065.76x = 425,126.04 × 172,101.68
  4. Step 4: Simplify right side
    308,065.76x = 73,164,905,695.75
  5. Step 5: Solve for x
    x = 73,164,905,695.75/308,065.76
  6. Step 6: Final answer
    x = 237,497.69

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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.