Home / 139,860,584.20-209,790,876.30-85,441,025.80

Finding the Fourth Proportional to 139,860,584.20, 209,790,876.30 and 85,441,025.80

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Solution

The fourth proportional to 139,860,584.20, 209,790,876.30 and 85,441,025.80 is: 128,161,538.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,860,584.20 : 209,790,876.30 = 85,441,025.80 : x
  2. Step 2: Convert to fraction form
    139,860,584.20/209,790,876.30 = 85,441,025.80/x
  3. Step 3: Cross multiply
    139,860,584.20x = 209,790,876.30 × 85,441,025.80
  4. Step 4: Simplify right side
    139,860,584.20x = 17,924,747,674,552,908
  5. Step 5: Solve for x
    x = 17,924,747,674,552,908/139,860,584.20
  6. Step 6: Final answer
    x = 128,161,538.70

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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.