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Finding the Fourth Proportional to 272,355.67, 408,533.51 and 85,381.75

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Solution

The fourth proportional to 272,355.67, 408,533.51 and 85,381.75 is: 128,072.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,355.67 : 408,533.51 = 85,381.75 : x
  2. Step 2: Convert to fraction form
    272,355.67/408,533.51 = 85,381.75/x
  3. Step 3: Cross multiply
    272,355.67x = 408,533.51 × 85,381.75
  4. Step 4: Simplify right side
    272,355.67x = 34,881,306,017.44
  5. Step 5: Solve for x
    x = 34,881,306,017.44/272,355.67
  6. Step 6: Final answer
    x = 128,072.63

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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.