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Finding the Fourth Proportional to 272,505, 408,772.08 and 85,531.08

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Solution

The fourth proportional to 272,505, 408,772.08 and 85,531.08 is: 128,301.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,505 : 408,772.08 = 85,531.08 : x
  2. Step 2: Convert to fraction form
    272,505/408,772.08 = 85,531.08/x
  3. Step 3: Cross multiply
    272,505x = 408,772.08 × 85,531.08
  4. Step 4: Simplify right side
    272,505x = 34,962,717,476.25
  5. Step 5: Solve for x
    x = 34,962,717,476.25/272,505
  6. Step 6: Final answer
    x = 128,301.20

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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.