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Finding the Fourth Proportional to 139,969,274.20, 209,953,911.30 and 37,743,645.40

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Solution

The fourth proportional to 139,969,274.20, 209,953,911.30 and 37,743,645.40 is: 56,615,468.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,969,274.20 : 209,953,911.30 = 37,743,645.40 : x
  2. Step 2: Convert to fraction form
    139,969,274.20/209,953,911.30 = 37,743,645.40/x
  3. Step 3: Cross multiply
    139,969,274.20x = 209,953,911.30 × 37,743,645.40
  4. Step 4: Simplify right side
    139,969,274.20x = 7,924,425,978,450,253
  5. Step 5: Solve for x
    x = 7,924,425,978,450,253/139,969,274.20
  6. Step 6: Final answer
    x = 56,615,468.10

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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.