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Finding the Fourth Proportional to 255,605.28, 352,733.68 and 139,318.64

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Solution

The fourth proportional to 255,605.28, 352,733.68 and 139,318.64 is: 192,258.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    255,605.28 : 352,733.68 = 139,318.64 : x
  2. Step 2: Convert to fraction form
    255,605.28/352,733.68 = 139,318.64/x
  3. Step 3: Cross multiply
    255,605.28x = 352,733.68 × 139,318.64
  4. Step 4: Simplify right side
    255,605.28x = 49,142,376,579.80
  5. Step 5: Solve for x
    x = 49,142,376,579.80/255,605.28
  6. Step 6: Final answer
    x = 192,258.85

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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.