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Finding the Fourth Proportional to 272,871.04, 409,361.92 and 85,839.04

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Solution

The fourth proportional to 272,871.04, 409,361.92 and 85,839.04 is: 128,775.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,871.04 : 409,361.92 = 85,839.04 : x
  2. Step 2: Convert to fraction form
    272,871.04/409,361.92 = 85,839.04/x
  3. Step 3: Cross multiply
    272,871.04x = 409,361.92 × 85,839.04
  4. Step 4: Simplify right side
    272,871.04x = 35,139,234,225.36
  5. Step 5: Solve for x
    x = 35,139,234,225.36/272,871.04
  6. Step 6: Final answer
    x = 128,775.98

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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.