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Finding the Fourth Proportional to 234,878.40, 324,126.27 and 139,383

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Solution

The fourth proportional to 234,878.40, 324,126.27 and 139,383 is: 192,345.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    234,878.40 : 324,126.27 = 139,383 : x
  2. Step 2: Convert to fraction form
    234,878.40/324,126.27 = 139,383/x
  3. Step 3: Cross multiply
    234,878.40x = 324,126.27 × 139,383
  4. Step 4: Simplify right side
    234,878.40x = 45,177,691,891.41
  5. Step 5: Solve for x
    x = 45,177,691,891.41/234,878.40
  6. Step 6: Final answer
    x = 192,345.03

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1.5x scale

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.