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Finding the Fourth Proportional to 309,167.84, 426,629.35 and 173,178.79

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Solution

The fourth proportional to 309,167.84, 426,629.35 and 173,178.79 is: 238,974.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,167.84 : 426,629.35 = 173,178.79 : x
  2. Step 2: Convert to fraction form
    309,167.84/426,629.35 = 173,178.79/x
  3. Step 3: Cross multiply
    309,167.84x = 426,629.35 × 173,178.79
  4. Step 4: Simplify right side
    309,167.84x = 73,883,154,611.49
  5. Step 5: Solve for x
    x = 73,883,154,611.49/309,167.84
  6. Step 6: Final answer
    x = 238,974.26

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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.