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Finding the Fourth Proportional to 253,928.72, 350,420.64 and 139,208

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Solution

The fourth proportional to 253,928.72, 350,420.64 and 139,208 is: 192,106.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    253,928.72 : 350,420.64 = 139,208 : x
  2. Step 2: Convert to fraction form
    253,928.72/350,420.64 = 139,208/x
  3. Step 3: Cross multiply
    253,928.72x = 350,420.64 × 139,208
  4. Step 4: Simplify right side
    253,928.72x = 48,781,356,453.12
  5. Step 5: Solve for x
    x = 48,781,356,453.12/253,928.72
  6. Step 6: Final answer
    x = 192,106.50

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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.