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Finding the Fourth Proportional to 139,788.43, 209,689.54 and 39,963.22

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Solution

The fourth proportional to 139,788.43, 209,689.54 and 39,963.22 is: 59,946.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,788.43 : 209,689.54 = 39,963.22 : x
  2. Step 2: Convert to fraction form
    139,788.43/209,689.54 = 39,963.22/x
  3. Step 3: Cross multiply
    139,788.43x = 209,689.54 × 39,963.22
  4. Step 4: Simplify right side
    139,788.43x = 8,379,868,594.59
  5. Step 5: Solve for x
    x = 8,379,868,594.59/139,788.43
  6. Step 6: Final answer
    x = 59,946.80

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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.