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Finding the Fourth Proportional to 272,256.90, 408,057.30 and 139,068.60

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Solution

The fourth proportional to 272,256.90, 408,057.30 and 139,068.60 is: 208,435.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,256.90 : 408,057.30 = 139,068.60 : x
  2. Step 2: Convert to fraction form
    272,256.90/408,057.30 = 139,068.60/x
  3. Step 3: Cross multiply
    272,256.90x = 408,057.30 × 139,068.60
  4. Step 4: Simplify right side
    272,256.90x = 56,747,957,430.78
  5. Step 5: Solve for x
    x = 56,747,957,430.78/272,256.90
  6. Step 6: Final answer
    x = 208,435.33

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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.