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Finding the Fourth Proportional to 256,896.49, 385,381.64 and 79,417.34

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Solution

The fourth proportional to 256,896.49, 385,381.64 and 79,417.34 is: 119,137.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,896.49 : 385,381.64 = 79,417.34 : x
  2. Step 2: Convert to fraction form
    256,896.49/385,381.64 = 79,417.34/x
  3. Step 3: Cross multiply
    256,896.49x = 385,381.64 × 79,417.34
  4. Step 4: Simplify right side
    256,896.49x = 30,605,982,808.16
  5. Step 5: Solve for x
    x = 30,605,982,808.16/256,896.49
  6. Step 6: Final answer
    x = 119,137.41

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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.