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Finding the Fourth Proportional to 139,860.60, 209,822.49 and 51,114.66

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Solution

The fourth proportional to 139,860.60, 209,822.49 and 51,114.66 is: 76,683.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,860.60 : 209,822.49 = 51,114.66 : x
  2. Step 2: Convert to fraction form
    139,860.60/209,822.49 = 51,114.66/x
  3. Step 3: Cross multiply
    139,860.60x = 209,822.49 × 51,114.66
  4. Step 4: Simplify right side
    139,860.60x = 10,725,005,236.70
  5. Step 5: Solve for x
    x = 10,725,005,236.70/139,860.60
  6. Step 6: Final answer
    x = 76,683.54

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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.