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Finding the Fourth Proportional to 251,953.92, 347,669.28 and 138,769.92

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Solution

The fourth proportional to 251,953.92, 347,669.28 and 138,769.92 is: 191,487.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    251,953.92 : 347,669.28 = 138,769.92 : x
  2. Step 2: Convert to fraction form
    251,953.92/347,669.28 = 138,769.92/x
  3. Step 3: Cross multiply
    251,953.92x = 347,669.28 × 138,769.92
  4. Step 4: Simplify right side
    251,953.92x = 48,246,038,172.06
  5. Step 5: Solve for x
    x = 48,246,038,172.06/251,953.92
  6. Step 6: Final answer
    x = 191,487.55

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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.