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Finding the Fourth Proportional to 139,404.40, 209,114.60 and 39,556.80

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Solution

The fourth proportional to 139,404.40, 209,114.60 and 39,556.80 is: 59,337.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,404.40 : 209,114.60 = 39,556.80 : x
  2. Step 2: Convert to fraction form
    139,404.40/209,114.60 = 39,556.80/x
  3. Step 3: Cross multiply
    139,404.40x = 209,114.60 × 39,556.80
  4. Step 4: Simplify right side
    139,404.40x = 8,271,904,409.28
  5. Step 5: Solve for x
    x = 8,271,904,409.28/139,404.40
  6. Step 6: Final answer
    x = 59,337.47

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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.