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Finding the Fourth Proportional to 253,242.72, 379,695.33 and 139,444.13

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Solution

The fourth proportional to 253,242.72, 379,695.33 and 139,444.13 is: 209,073.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    253,242.72 : 379,695.33 = 139,444.13 : x
  2. Step 2: Convert to fraction form
    253,242.72/379,695.33 = 139,444.13/x
  3. Step 3: Cross multiply
    253,242.72x = 379,695.33 × 139,444.13
  4. Step 4: Simplify right side
    253,242.72x = 52,946,285,906.15
  5. Step 5: Solve for x
    x = 52,946,285,906.15/253,242.72
  6. Step 6: Final answer
    x = 209,073.28

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.