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Finding the Fourth Proportional to 139,658,793.60, 209,488,190.40 and 48,770,572.80

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Solution

The fourth proportional to 139,658,793.60, 209,488,190.40 and 48,770,572.80 is: 73,155,859.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,658,793.60 : 209,488,190.40 = 48,770,572.80 : x
  2. Step 2: Convert to fraction form
    139,658,793.60/209,488,190.40 = 48,770,572.80/x
  3. Step 3: Cross multiply
    139,658,793.60x = 209,488,190.40 × 48,770,572.80
  4. Step 4: Simplify right side
    139,658,793.60x = 10,216,859,040,643,460
  5. Step 5: Solve for x
    x = 10,216,859,040,643,460/139,658,793.60
  6. Step 6: Final answer
    x = 73,155,859.20

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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.