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Finding the Fourth Proportional to 139,869.90, 209,801.07 and 34,687.62

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Solution

The fourth proportional to 139,869.90, 209,801.07 and 34,687.62 is: 52,030.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,869.90 : 209,801.07 = 34,687.62 : x
  2. Step 2: Convert to fraction form
    139,869.90/209,801.07 = 34,687.62/x
  3. Step 3: Cross multiply
    139,869.90x = 209,801.07 × 34,687.62
  4. Step 4: Simplify right side
    139,869.90x = 7,277,499,791.75
  5. Step 5: Solve for x
    x = 7,277,499,791.75/139,869.90
  6. Step 6: Final answer
    x = 52,030.49

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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.