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Finding the Fourth Proportional to 208,121.48, 287,220.62 and 117,492.80

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Solution

The fourth proportional to 208,121.48, 287,220.62 and 117,492.80 is: 162,147.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,121.48 : 287,220.62 = 117,492.80 : x
  2. Step 2: Convert to fraction form
    208,121.48/287,220.62 = 117,492.80/x
  3. Step 3: Cross multiply
    208,121.48x = 287,220.62 × 117,492.80
  4. Step 4: Simplify right side
    208,121.48x = 33,746,354,861.54
  5. Step 5: Solve for x
    x = 33,746,354,861.54/208,121.48
  6. Step 6: Final answer
    x = 162,147.39

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.