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Finding the Fourth Proportional to 272,354.67, 408,532.01 and 85,380.75

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Solution

The fourth proportional to 272,354.67, 408,532.01 and 85,380.75 is: 128,071.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,354.67 : 408,532.01 = 85,380.75 : x
  2. Step 2: Convert to fraction form
    272,354.67/408,532.01 = 85,380.75/x
  3. Step 3: Cross multiply
    272,354.67x = 408,532.01 × 85,380.75
  4. Step 4: Simplify right side
    272,354.67x = 34,880,768,985.90
  5. Step 5: Solve for x
    x = 34,880,768,985.90/272,354.67
  6. Step 6: Final answer
    x = 128,071.13

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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.