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Finding the Fourth Proportional to 252,573.12, 348,540.72 and 139,394.40

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Solution

The fourth proportional to 252,573.12, 348,540.72 and 139,394.40 is: 192,358.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    252,573.12 : 348,540.72 = 139,394.40 : x
  2. Step 2: Convert to fraction form
    252,573.12/348,540.72 = 139,394.40/x
  3. Step 3: Cross multiply
    252,573.12x = 348,540.72 × 139,394.40
  4. Step 4: Simplify right side
    252,573.12x = 48,584,624,539.97
  5. Step 5: Solve for x
    x = 48,584,624,539.97/252,573.12
  6. Step 6: Final answer
    x = 192,358.65

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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.